Archive of Our Own

The Batcave is real.

Tim sits in the swivel chair at the computer, slowly spinning around in circles as he stares up at the enormous cavern surrounding him. He can’t believe this place is real. Sure, he'd heard Batman and Robin talk about the cave on several occasions over the years, but hearing and seeing are two completely different things.

For a long time, the Batcave had only lived in Tim’s head as an idea rather than an actual thing. Now, seeing it in person, it makes everything feel real in a way Tim’s photographs never quite did, and that’s part of the reason he had wanted to find it so badly.

It’s the ultimate piece of evidence proving Batman truly exists. Sure, Tim already had all the proof he’d ever need, and he certainly didn’t need to see the cave to confirm it, but this feels different somehow.

The main reason Tim is here, though, is because he desperately needs to track down Bruce. He’s pretty sure the man is actively ghosting him, and this is the only place Tim can think of where he’s guaranteed to find him. Besides, Tim doubts the Bat-Signal trick is going to fool him again.

The problem is they haven’t spoken since that night on the rooftop almost a month ago, and no, Tim doesn’t believe it’s due to some unfortunate scheduling conflict on both of their parts. Bruce is avoiding him on purpose. Ever since their talk, he’s changed every single patrol route Tim knew about, making himself nearly impossible to find unless Tim wanted to spend every night aimlessly sprinting through Gotham hoping to catch a glimpse of a cape.

Which, admittedly, he did try for a while.

Now Tim doesn't know whether Bruce changed his mind about the whole Robin situation or whether he simply feels too guilty to look Tim in the eye, but it doesn't matter. If Batman doesn't want him to be Robin, then he needs to act like an adult and actually say it to his face.

Granted, Tim wouldn't accept no for an answer, but he would still appreciate the effort.

What Bruce is doing now is cowardly.

Plus, if this is more of a Tim issue than a Robin issue in general, Tim would be perfectly happy for Batman to recruit somebody else instead. It'd be better for him anyway because it would allow him to return to his favourite hobby. Still, something tells him this isn't specifically about Tim. Bruce just doesn't want another kid sidekick, regardless of who it is.

Unfortunately for Bruce, Batman needs a Robin.

So if that means Tim has to corner him on his home turf where, theoretically, he can't run away, then so be it.

The only downside of being here for Tim is that it’s going to raise several deeply inconvenient questions he'd rather not answer. Questions like how did you find out where I live? and who even are you? aren’t exactly easy to explain without things getting incredibly awkward.

But that just means they'll both be uncomfortable, so at least Batman won't be suffering alone. 

Also, Tim deserves to be Robin now purely based on the amount of hassle he had to put up with to even find the cave.

At first, like most things in Tim’s life, he'd assumed it would be easy. Bruce Wayne lived in Wayne Manor, so naturally the entrance had to be somewhere nearby. Anything farther away would be wildly impractical. There'd be no point in having a Batcave halfway across Gotham if Batman then had to abandon the Batmobile miles away at the end of every patrol and hike home on foot. The logistics alone would be absurd.

At the very least, that narrowed the possible location down considerably.

After a bit of digging through Wayne Manor’s architectural records, Tim eventually found a small, almost incidental note buried deep within the blueprints referencing an underground cave system, marked only as unstable terrain requiring structural reinforcement. It was vague enough to pass as meaningless to anyone else, but precise enough that Tim immediately knew what it actually referred to.

The main entrance to the cave appeared to be somewhere inside Wayne Manor itself, most likely integrated into the basement structure. Tim, for obvious reasons, couldn't exactly stroll through Bruce’s house and wander down into his secret underground headquarters, so he had to get creative.

Since the cave connected to Gotham’s underground systems, he only needed to find an alternate route in through the wider tunnel network instead. Thankfully, the full extent of Gotham’s subterranean infrastructure wasn't publicly documented, which meant he didn't have to worry too much about accidentally running into anyone else down there.

Tim assumes that is precisely why Bruce built the cave there in the first place.

Unluckily for Tim, his decision to explore the cave system himself led to some… complications.

See, Tim has a problem. Ever since he was young, he’s had a habit of ending up in situations wildly over his head.

Tim remembers climbing the tallest trees in his garden with absolutely no plan for how to get back down afterwards, often resulting in bruises and, on particularly memorable occasions, broken bones. He also used to launch himself straight into the deep end of pools despite not actually knowing how to swim at the time.

Then there was the time he decided to prove he could jump his bike across the creek behind his school because some older kids said he couldn’t do it. He’d missed the landing entirely and crashed straight into the water.

Being called a child prodigy multiple times a day by his teachers didn’t exactly help his ego, and it left a young, impressionable Tim with a slightly warped sense of his own limits, convinced that being smart meant he could pull off anything if he tried hard enough.

In any case, it was this exact mindset that led him to severely underestimate the scale of Gotham’s cave systems.

He’d chuckled at first, rubbing his hands together and smirking. In and out. Half an hour tops, he’d told himself.

Long story short, that was how he ended up lost underground with nothing but a head torch, a shovel, and no food or water. At one point, he genuinely thought he was going to die when an archway collapsed and he got trapped between two boulders for hours. He had to dig himself out, and by the time he finally emerged from the tunnels and made it back home, a full day had already passed. He was starving, covered in grime and sweat, and severely dehydrated.

The next time he explored the caves, he came better prepared.

It still took him several more days, but by the end of it Tim had mapped enough of Gotham’s underground cave system to ensure he wouldn’t get lost down there again and, more importantly, found the Batcave.

He also built a secret passage connecting the cave system to the wine cellar of Drake Manor for convenience, which only took him an additional two weeks.

Tim huffs as his chair slowly spins to a stop and he looks around at his surroundings. The cave is definitely impressive, that's for sure. The Batcomputer is incredible, Tim's never seen anything so technologically advanced in his life, and the dinosaur is cool as hell. The rest, however, not so much. To put it lightly, the rest is kind of… well, creepy. 

Tim shudders at the sight of the giant playing card with the Joker’s face plastered across it and the old Robin suit hanging in a clear case. Yikes, he thinks, cringing internally. Living down here must really suck the life straight out of Bruce.

If Tim and Bruce ever reach the point in their partnership where he’s allowed to offer interior design advice, the very first thing he’s doing is telling him to get rid of the giant coin. It’s an eyesore, it’s aggressively on-the-nose, and it makes the entire cave smell faintly like pennies.

Speaking of the devil, the sound of footsteps descending the spiral stone staircase makes Tim straighten in his seat.

About time.

He glances up at the clock on the Batcomputer. 12:06 a.m.

Six hours.

Tim’s been down here for six hours. Far longer than he would’ve guessed. At this point, it almost feels like Bruce actually goes to his day job or something, which can’t be right.

There is at least an upside to the waiting. He did figure out how to hack into the Batcomputer and access a few files without a password, so sitting here hasn’t been a complete waste of time.

And in Tim’s defence, he did want to get here before Bruce did. The element of surprise is important.

Bruce disappears into a room further back in the cave for a few minutes before re-emerging fully suited up, cowl on and everything. He crosses the cave at a steady pace, distracted, one hand adjusting something on his utility belt as he heads for the Batcomputer.

Then Batman catches sight of Tim.

He stops immediately.

The white lenses of his cowl widen slightly, then narrow as he studies him. He makes a noise Tim can only describe as half sigh, half growl before continuing forward, this time much faster.

He stops only when he is inches from Tim’s face, towering over him with a thoroughly unimpressed expression.

“It’s you again.”

“Yep,” Tim says with a wide smile, making sure to really emphasise the p sound.

He does it as obnoxiously as possible, purely to rub it in Bruce’s stupid face that Tim is not as dumb as he thinks he is, and that a measly patrol route change is nowhere near enough to get rid of him. Plus, for the record, Tim would’ve worked out the new route eventually, he was just preoccupied with finding the cave, and now that he’s found it, doing so would be pointless.

“Why… no, how are you here?” Bruce’s brow furrows as he stares at Tim, trying to work out how a scrawny teenager managed to uncover a secret hideout that even some of Gotham’s most dangerous criminals don’t know about.

Then his expression abruptly hardens, and Batman places a hand on Tim’s shoulder, the gesture landing more like an interrogation than reassurance. “If you're working with the League, or any other criminal organisation for that matter, and you're being coerced against your will, you can tell me, and I will-”

Tim immediately swats his hand away, staring at him in horror.

“What!? Who’s the League?” he blurts out, then immediately shakes his head. “Actually, no. Never mind. I do not want to know. That is completely beside the point.”

Tim lets out a frustrated sigh and rolls the chair backwards, putting a bit more distance between the two.

“Not that it's any of your business,” he says defensively, “but I found the cave myself, and it honestly didn't even take that long.”

Lie

“This is my business,” he growls. “You are trespassing on private property.”

“Private property?” Tim snickers. “Yeah, because I’m sure this place is fully legal and properly registered with the city.” He gestures broadly around the cave. “Go ahead. Call the police.”

Tim immediately mimes dialling a phone number before holding his hand to his ear.

“‘Hello, officer? Somebody broke into the Batcave.’”

Tim pretends to pause, then nods solemnly.

“‘Yes, it’s extremely serious.’”

He hums thoughtfully, nodding again.

“‘You’re sending the commissioner? Well, that’s just splendid!’”

Batman wears a thoroughly withered expression and looks just about done with life as Tim laughs at his own joke, then pretends to hang up the call.

“Finished?” he glowers, narrowing his eyes.

Tim awkwardly clears his throat. “Yes, sir.”

It's probably best not to continue poking the beast just yet.

“I’m going to ask you some questions,” Batman says. “And if you still want to be Robin, I think you’ll find it is in your best interest to answer as honestly as possible. Can you do that, or am I going to need the truth serum?”

Tim gulps and nods hastily.

He's joking, right?

Please be joking.

“How did you find this place?”

Tim answers truthfully. “The underground cave tunnels.”

He says it like it’s obvious, as if Bruce should be impressed rather than alarmed.

Batman tilts his head by a fraction, a movement so small it'd be easy to miss if you didn’t know what to look for. It’s clear he doesn’t know what to make of Tim.

Tim smiles brightly, keeping his focus fixed where he assumes Bruce’s eyes are beneath the cowl. “It was no problem at all, sir. Navigation is just one of the many skills I’ll be bringing to the table as Robin.”

Bruce pauses briefly, either for dramatic effect or because he’s carefully choosing his next question. 

“Do you know who I am?” he finally asks.

Tim momentarily looks away, tapping his fingers nervously against the arm of the chair.

“Uh… yes. Mr Wayne-Batman-sir.”

Bruce looks mildly displeased at the breach in security, though by the look on his face, he clearly wasn’t expecting a different answer.

“How?” he immediately follows up with.

“Respectfully, your son’s a show-off,” Tim points out. “I saw Robin do a quadruple somersault once, and there are only three people in the world who could pull that off. Two of them are dead.”

Tim thinks he catches Bruce muttering something under his breath that sounds suspiciously like, “I told him so.”

“Last question,” Batman sighs, eyeing Tim up and down.

“Go on, I can handle it,” Tim responds, forcing an overly confident grin onto his face.

Bruce exhales sharply and pinches the bridge of his nose.

“What are you wearing?”

Tim’s grin widens. He springs up from the chair, which skids backward on impact and rolls towards the training mats.

“It’s my Robin costume. Don’t you like it? I made it myself.”

He does a quick spin to show it off properly. The torso piece is red and fitted snugly over his frame, with green sleeves, gloves, and leggings beneath black boots. A dark cape drapes over his shoulders, lined in yellow and fastening at the neck with a short clasp, whilst a green domino mask sits neatly over his eyes.

Tim glances down at himself, completely satisfied, and shrugs.

“I thought I’d add pants,” he says casually. “The shorts were not going to cut it for me.”

Bruce stares at him for a long moment, completely still, as if he's trying to decide whether Tim is being serious or not. When it becomes clear that Tim is, in fact, entirely serious, his expression shifts into something approaching disbelief.

“That suit won't work. It needs to be properly designed. It’ll require thermal regulation, GPS and short-range trackers, impact padding across the ribs and shoulders, reinforced stitching at the joints, emergency comms integrated into the mask, and a failsafe locator in case you get knocked unconscious,” Bruce says. “At minimum.”

“Done, done, done, and done!” Tim cuts in immediately, raising his hands and ticking each point off on his fingers as he goes. “Relax, I’ve already thought of everything. There’s nothing left for you to add that'll make it any better than it already is.”

Batman still looks unconvinced.

“What?” Tim says. “I took a class in textiles a few years back.” His mouth tilts slightly, too pleased with himself to hide it.

Bruce pauses with uncertainty, before letting out a low grunt of acknowledgement and dropping the matter for now.

His attention shifts to the clock. He frowns slightly. “I need to patrol. We can discuss this further at a later time.”

Tim claps his hands together and pumps a fist into the air, visibly excited. “Yes! Let’s go.”

Batman places a hand against his chest, stopping him firmly in place.

“No. You're staying put.”

“You’re kidding,” Tim says, floored.

Bruce looks him dead in the eyes through the cowl.

“What! Why?” Tim complains, very deliberately not whining like a child.

“Just because you have the suit doesn’t mean you’re ready to be Robin yet. For starters, you’ve had no proper training,” Bruce says flatly.

A slow, satisfied smile starts to creep onto Tim’s face.

“Trust me,” Tim says, his hand sliding into his utility belt and pulling out a collapsible bo-staff. It unfolds smoothly, locking into full length with a quiet, solid click. “I figured I’d save you the time and come prepared.”

⊹₊｡ꕤ˚₊⊹

3 months ago:

If Tim wants to be Robin, he knows he can't just look the part. He has to act the part too. And, arguably, the most important quality of being Robin is being able to win fights and hold their own in a battle.

Right now, Tim can do neither of those things.

Still, surely anyone can learn with enough dedication.

No offence, but Bruce literally picked Jason up off the streets. If someone that malnourished can be turned into peak physical condition, then so can Tim. So what if he can't even run to the refrigerator without becoming out of breath? That's just a technicality.

Also, Tim supposes he’ll save Bruce the trouble of having to train him. If Batman trains him, it’ll create a mentor-mentee dynamic Bruce will inevitably try to hold over him later, and Tim is aiming for an equal partnership. In fact, the less Bruce is actively involved in his Robin duties, the better. They’ll patrol together and solve cases together, but that’s it. Tim isn’t looking to be another son.

Instead of Batman, he’ll just skip straight to the master of martial arts herself: Lady Shiva. That seems like the logical progression.

He just needs to track her down first.

Turns out Lady Shiva isn’t all that hard to find. Who would’ve thought? A few conversations with a guy who knows a guy who knows another guy who’s friends with a hitman who knows an assassin who can point him in Shiva’s direction, and a flight to Paris later, Tim finds himself standing in a quiet, unremarkable courtyard tucked behind a narrow row of apartments.

One minute he’s double-checking the address he’s been given, still not entirely convinced he hasn’t been duped, and the next, she’s just there, as if she’s always been there.

She studies him for a long moment without speaking, her expression carefully blank, offering nothing. And Tim, for his part, tries not to look like he's aware of this scrutiny.

When she doesn't speak, Tim bites the bullet and tells her he wants to learn how to fight properly. Shiva tilts her head slightly at that, and something faintly amused flickers across her face.

There’s a price, and Tim pays it. He isn’t proud of what he did, and he’s since mentally filed it away under do not think about this ever again, but in the end, Shiva accepts.

The first lesson begins immediately.

Shiva simply moves. One second she is still, and the next she's in front of him, hand snapping toward his throat in a strike so fast Tim barely registers the intent before he's reacting, stumbling backward and nearly tripping over his own feet. When he thinks he's dodged, she's already gone from where she was, repositioned behind him without sound, correcting his stance with a light push that sends him off balance again. It's not even a fight yet. Every movement she makes exposes a flaw in his posture, his timing, his awareness, until Tim is breathing harder than he expects after less than a minute and he realises he hasn't landed a single hit.

Shiva finally stops and circles him slowly, observing him the way one might observe fresh clay, already deciding what it can and cannot become.

She tells him bluntly that he is fast in thought but slow in body, that he anticipates too much and commits too little, and that fear sits in his shoulders even when he pretends it doesn't exist. Tim tries to argue, but she doesn't acknowledge it. She simply corrects him again, this time by knocking his feet out from under him so cleanly he hits the ground without even understanding how it happened.

Days blur after that.

There's no schedule in the way Tim understands schedules. Shiva trains him when she chooses, and for as long as she chooses. Sometimes she speaks, sometimes she doesn't. Sometimes she demonstrates a technique once and expects him to understand it immediately. Sometimes she says nothing at all and simply waits whilst he repeats the same motion until his muscles fail. She teaches him how to fall without hesitation, how to stand without wasted movement, how to breathe correctly when every part of him is burning. She breaks down everything he thinks he knows about fighting and rebuilds it into something colder and more precise.

Tim learns quickly, because he always has, but Shiva never praises speed. When he improves, she simply makes the next lesson harder. When he predicts her movement correctly for the first time, she counters it instantly and puts him on the ground again without hesitation. When he finally lands a clean strike against her ribs, she acknowledges it with the faintest narrowing of her eyes and then increases the difficulty until he cannot repeat it no matter how hard he tries. It becomes clear that progress is not something she rewards. It's something she expects.

There are moments when she leaves him alone between sessions, and those are almost worse. Tim sits on cold stone or cracked concrete, replaying every movement in his head until his thoughts start to move like hers, stripped of hesitation and excess. He begins to understand why Shiva moves the way she does.

By the time he can keep up for more than a few exchanges without being immediately dismantled, something in Shiva’s approach changes. She stops correcting him as often and starts testing him instead. She introduces unpredictability, sudden shifts in rhythm, attacks that are not meant to land but to force reaction. Tim learns to adapt under pressure, to stop thinking of combat as a sequence and start treating it as survival. He stops trying to win and starts trying to endure efficiently, which is apparently closer to what she's been shaping him toward all along.

One evening, after a session that leaves him bruised in places he didn’t realise could bruise, Shiva pauses longer than usual. She looks at him for a moment, assessing, and tells him he is still clumsy, still too attached to control, but no longer completely untrained. It’s the closest thing to approval she gives. Tim isn’t entirely sure if it’s meant to be kind, but he takes it anyway.

After a month, Shiva looks him in the eye and tosses him a bo-staff in a way that makes it clear it isn’t a gift but a judgement.

She doesn’t teach him how to use it, just expects him to figure it out. At first, Tim is clumsy with it, overthinking every angle, every shift in grip. But Shiva doesn’t correct him. She simply attacks, again and again. The staff becomes something he learns through failure rather than guidance, and slowly he stops treating it like an object and starts treating it like an extension of himself.

He becomes stronger with each passing day, and his endurance builds until exhaustion is something he can push through rather than something that stops him. He stops flinching at the first strike and starts reading the second, then the third, then the intent behind them. By the two-month mark, he can hold his own for longer than a few exchanges without immediately being dismantled.

It’s also at the two-month mark when Shiva tells him flatly that for all his effort, he is still fundamentally useless in a real fight, but that they’ll meet again when the time comes. Then she turns away as if the matter is settled, as if there is nothing more she can extract from him, and leaves without looking back.

Tim stands there, bo-staff in hand, utterly confused.

If nothing else, he supposes he got what he needed. He’s officially good enough to be Robin, even if he doesn’t come close to meeting Lady Shiva’s standards yet.

⊹₊｡ꕤ˚₊⊹

Batman and Robin stand shoulder to shoulder at the edge of the rooftop, both facing out over Gotham. The wind cuts across the height of the building and tugs at their capes, making the fabric shift and settle in loose synchronisation. Batman’s gaze remains fixed outward, scanning the streets and rooftops below with unwavering focus.

Tonight, a new Robin is born.

Tim purses his lips as he squints out into the distance. “Sooo...” he draws out slowly, rocking back on his heels. “What now, partner?”

Hours have passed since his first patrol began, and so far all they’ve done is stand around in silence, staring at the same empty buildings. Tim is beginning to suspect Batman is intentionally messing with him. The block they are supposedly “watching” is completely lifeless aside from a family of raccoons rummaging through the dumpster in the alley below and a stray cat that has been batting around the same crumpled piece of paper for the better part of thirty minutes. Nothing suspicious has happened. No muggings, no drug deals, no violent rooftop chases, absolutely nothing. Honestly, Tim is starting to think Batman deliberately picked the only crime-free area left in Gotham purely to test his patience. Which, now that he thinks about it, does sound exactly like something he would do.

Tim suppresses a sigh. Despite his growing boredom, he doesn't want Batman thinking he's incapable of taking this seriously. He runs a hand through his hair before straightening again, trying to look at least somewhat professional.

“Watch,” Batman grunts.

Tim drags a hand down his face in frustration. “This stakeout is a bust,” he mutters, gesturing vaguely at the surrounding buildings. “There's nothing happening here.”

Batman doesn't fully turn towards him, though his head shifts slightly in Tim’s direction. “You’re mistaken,” he says evenly. “This isn’t a stakeout.”

Tim immediately twists around to stare at him properly. “What?” he whisper-yells, barely stopping himself from raising his voice loud enough to echo across the rooftops. “Then why have we been staring at these random buildings for three hours!?”

“I’m training you.”

Tim lets out a long, deeply unimpressed exhale and tips his head back towards the sky for a moment. “I thought I told you I’ve already been trained.”

There's no way Tim is going to let Batman develop some sort of superiority complex over him through training. The second Bruce starts acting like his teacher, they're no longer equals. Tim is definitely not Bruce’s side project, and he's definitely not some wide-eyed protégé following him around waiting for approval. It doesn’t matter that Bruce has been doing the vigilante thing longer than Tim’s been alive and probably does have genuinely useful things to teach him. That is completely irrelevant. Tim is a hands-on learner anyways. Anything he doesn’t know yet he can pick up naturally in the field, not through some painfully boring training exercise that wastes everybody’s time.

“You did,” Batman replies dryly. “Combat is only one aspect of the job. Observation, situational awareness, behavioural analysis, environmental memory retention, threat assessment, pattern recognition. Those matter just as much.” He pauses briefly before continuing. “A detective notices everything in their environment, especially the things that appear unimportant.”

Tim crosses his arms stubbornly. “Your point?”

Batman diverts his full attention to Tim. “Can you tell me what happened on this street?”

Tim quickly realises Bruce has underestimated him, assuming he hadn’t been taking notes of his surroundings this entire time like an idiot

“The stray cat started playing with that paper ball at 2:23 and abandoned it twice before coming back to it. The raccoon family came out of the alley at 2:41. There are four of them, not three. The smallest one stayed under the dumpster until around 2:56. The neon sign above the pawn shop flickers every seventeen seconds before dimming and buzzes slightly louder right before it does. One of the streetlights on the opposite corner went out for twelve seconds at exactly 3:00 before turning back on. Steam started venting from the manhole cover near the laundromat at 4:19 and has slowed twice since then, which probably means there’s some kind of pressure fluctuation below street level. The office building to the left has a smashed first-floor window. Also, the fire escape on the apartment building to the right is missing two bolts on the bottom ladder hinge.”

Batman remains silent.

Tim lifts an eyebrow. “Want me to keep going?”

A deeply smug sense of satisfaction settles in his chest.

That’s right, folks. Photographic memory. Plus, this is far from Tim’s first rodeo. Honestly, he is a little offended Batman thought he wouldn't be able to answer that question. Shiva trained him how to memorise any environment within a matter of seconds. She would leave him standing in crowded public spaces for hours before demanding exact breakdowns of every environmental change down to the smallest detail.

Batman studies him for a moment. Then, finally, he speaks.

“You memorised details,” he says flatly. “Good.”

Validation from Batman already. See, Tim knew he had this in the bag. Bruce should be impressed. 

“But that wasn’t the question.”

Tim’s expression falters slightly. “Uh.”

Batman turns his attention fully back towards the street below. “I asked if you could tell me what happened.”

Tim opens his mouth immediately, fully prepared to argue, because that was what happened, thank you very much.

“You listed environmental changes,” Batman continues. “You catalogued movement patterns, structural inconsistencies, timing irregularities. Useful information. But you never asked yourself why any of it mattered.”

He frowns. 

“The broken window.”

Tim blinks, "What?"

Batman gestures once towards the office building across the street. “There are water stains and visible signs of impact around the frame. Yet you dismissed it as background detail instead of treating it as something of value.”

Tim’s smugness begins to evaporate at an alarming rate.

“A detective doesn’t just observe their environment,” Batman says. “He interprets it.”

Tim grimaces faintly. Okay. That’s annoyingly solid advice.

Batman’s attention shifts upwards again towards the damaged window. “So let me ask you a different question, Robin.”

Tim instinctively looks up too.

“What happened to that window?”

Tim squints. “Somebody smashed it so they could rob the place?” he offers weakly.

Batman says nothing.

Tim exhales slowly through his nose and forces himself to focus. His gaze drops to the alley below.

It’s too clean.

Not clean clean, because this is still Gotham, but there’s no shattered glass beneath the broken pane.

Tim straightens slightly.

“There should be glass down there,” he says slowly. “Which means somebody cleaned it up after the window broke.” He squints harder toward the alley. “But if this was a robbery, why would a burglar bother cleaning anything at all?”

He pauses, replaying the scene again in his head.

“Unless it wasn’t a robbery.” His voice sharpens as the idea forms. “Say someone breaks into an abandoned office building because they need somewhere to hide temporarily. They enter through the window because the doors are locked. Afterwards they clean up the glass so nobody notices the break-in.” His eyes flick to the damaged pane. “Then maybe whoever they’re hiding from eventually finds them...”

Batman remains silent, which Tim unfortunately takes as encouragement.

“The steam venting from below suggests underground access,” Tim points out. “If someone came after them, those tunnels would be the perfect way to drag them out of the area without anybody noticing.”

Silence.

Tim risks a glance sideways. “Right?”

Batman doesn’t answer immediately. The pause lasts just long enough for Tim’s confidence to begin collapsing again.

“Wrong,” Batman says at last.

Tim blinks.

“This incident happened last month,” Batman explains. “The window broke during a storm. High winds sent debris through the glass. Building maintenance cleaned the alley afterwards, but the pane itself was never replaced due to insurance delays.”

Tim just stares at him.

“Oh.”

Batman sighs. “You constructed an entire narrative from a single detail when you could’ve verified what happened to that window in under twenty seconds with a basic search.”

Tim looks back at the building, slightly dazed.

“This feels unfair,” he declares. “You totally baited me. Why else would you point out the window if it wasn’t important?”

“Because if this had been a real case,” Batman replies, “you would’ve needed to investigate it. The problem wasn’t that you formed a theory. The problem was that you committed to one before verifying any of the facts.”

Tim grimaces, jaw tightening slightly as he absorbs the criticism. 

Batman watches him from beneath the cowl. “Your instincts aren’t bad,” he admits. “But instincts without discipline will get people hurt.”

Tim stares down at the toes of his boots for a moment before glancing back up.

“…Did I pass?”

Batman turns away, cape shifting behind him as he pulls a grappling hook from his utility belt and aims it out across the rooftops.

“Pass what?”

Tim blinks at him, then reaches for the grappling hook, holding it up slightly. “The test,” he says. “This was a test, right?”

Bruce fires the grappling hook. The line snaps taut as it disappears into the darkness above.

“Yes,” Batman says. “And you didn’t.”

Tim’s face falls.

Then, after a pause, Batman adds, “I’ll see you tomorrow night, Robin.”