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The noon sun sat high and generous above the forest, pressing warmth through the canopy in broad, shifting columns that fell across the path in dappled patterns. The river ran close, its voice threading beneath the layered sounds of the woodland, that particular steady murmur of water which had found its course and seen nothing worth changing about it across however many centuries it had taken to carve the stone beneath.
Percy walked beside Artemis with an easy familiarity, for he had learned to match her pace across the time they had spent together, and their shoulders brushed now and then as the trail narrowed and widened in the uneven rhythm of wild land that mortal hands had never shaped. Her auburn curls caught the fragmented light spilling through the leaves, each strand briefly luminous before the shade claimed it back. Beside her the dark locks at his brow lifted faintly whenever the breeze turned, and his sea green eyes carried the loose contentment of a man telling a half remembered tale from Camp Half Blood, something about a chariot race that had ended in a sudden reversal of fortune. She listened with that singular attention she reserved for the stories of his childhood, complete and genuine, the sort that held onto small details and returned them to him seasons later, as though she had kept each one safely folded away.
Then both of them stopped.
It was not a sound, precisely, not a thing either of them caught with the ear in the way one catches birdsong and running water. It was something older and less nameable than hearing, the awareness that arrives before the senses can gather themselves into anything useful, the instinct that something nearby had slipped from its natural state into a shape that demanded attention.
Percy felt it as a disturbance in the river ahead, its rhythm bending from that peaceful, consistent murmur into something deviant, as though the current had met a presence it could not quite trust. Artemis had gone still beside him with the immediate, total alertness of a huntress whose instincts marked wrongness before her mind had finished naming it, her silver eyes sharpening toward the forest.
The sound followed a heartbeat after.
A howl, long and resonant, rolled through the oaks in a wave the forest swallowed without echo, the way it swallowed things it knew belonged elsewhere. There was a strange familiarity woven through it, and yet it sat wrongly among these oaks, its rhythm too erratic, its edge too keen, its tone unlike that of wild wolves and unlike even the divine hunting hounds. It seemed to rise from some other geography entirely.
They glanced at each other at the very same instant, a silent accord passing between them.
Together they followed the sound through the wood, their boots finding the ground with the quiet familiarity of a couple that had hunted side by side long enough to share a wordless language of movement. The river kept pace to their left, glimpsed through gaps in the undergrowth as a bright, shifting ribbon of caught sunlight. The howling lifted a second time, then fractured into several throats at once, the voices of beasts behaving as beasts should not.
The oaks parted onto a broad riverbank where the water curved gently through the land, the ground soft and level beneath a deep drift of old leaf fall, and they took in the whole of the scene at a single glance.
A dozen hellhounds.
They were enormous, as they had always been, vast dark shapes that seemed to drink the sunlight pooling around them, their eyes lit with a dim, sulfurous glow that owed nothing to the noon overhead. They shifted in loose, unraveling patterns across the bank, some circling, some pressing toward the woods, some merely standing and loosing that displaced howl which had drawn the couple here. They were not attacking, they were not hunting, they were simply adrift, in the manner of creatures that had been somewhere else entirely and had happened to arrive here by accident rather than by intent.
At the heart of them, ringed and plainly overwhelmed, stood Nico.
He wore the look he always wore when a thing had gone sideways, which was to say the look of someone well acquainted with havoc and, even so, presently testing its outer edges. His dark clothing drank the forest shadow as the hellhounds drank the light, and his sword sat sheathed, which told them at once that this was a matter of management rather than of battle. He was issuing commands in a low, firm voice, pointing toward a pool of shadow at the base of a nearby oak, and the hellhounds ignored him with the thorough devotion of beasts that had jointly resolved to pursue interests of their own.
Nico turned at the sound of their approach.
The relief that crossed his face when he knew Percy was immediate and unguarded, the honest relief of someone handed help he had not dared to expect. Then his gaze moved to Artemis, and the relief folded itself into something decidedly careful, his posture straightening with the instinctive adjustment of a man who has just registered that a goddess stands at the edge of the bank.
He bowed, the motion proper and deliberate, his head lowering with a respect that held nothing performative, "Lady Artemis," he said, his voice steady, though the faint tension along his jaw betrayed him, "My apologies for the disturbance to your forest, this was not my intent."
"Son of Hades," she answered, her tone level, carrying the composed authority she wore whenever a matter asked for solemnity without effort, though her silver eyes had already drifted from Nico to the hellhounds with the appraising attention of a huntress taking inventory, "I trust there is an explanation for this mess."
"Yes, my lady," he said, still bent in his shallow bow, as though uncertain whether the moment to rise had yet come.
"Nico, it has been a while," Percy stepped forward and clapped him on the shoulder with the plain warmth of a cousin who had seen him in far grimmer straits, "Care to tell us what happened?"
Nico rose properly then, the tension in his frame easing by measured degrees, "My father set me a task," he said, as though describing a thing entirely reasonable in theory, "A pack of hellhounds found a passage out of the Underworld yesterday, and he wished them retrieved before they troubled the mortal world," he stopped, his gaze tracking one of the larger beasts as it stooped to investigate the river and recoiled from the water with an offended sound, "They found this forest instead, and I tracked them here."
Percy studied the pack, counting, marking the way they moved, the direction they kept drifting toward before something tugged them back, "Why do they not heed your commands?"
"They are disoriented," the frustration in his voice could only have been earned by long hours spent upon the problem, "The passage they used was unstable, it set them down too far from familiar ground, and they have been unsettled since, normally they answer me, in this state, they have chosen instead to be obstinate."
"We shall help you," Artemis said after a moment of consideration, her silver eyes steady with a settled resolve.
Nico turned to her at once, gratitude and caution arriving in equal measure as he grasped exactly whose aid he was being offered, he bowed a second time, lower now, "I shall be grateful, my lady, beyond what I can suitably put into words."
Percy was already turning the geometry of the trouble over in his mind, his sea green eyes traveling between the river, the woods, and the scattered stations of the hellhounds. The river bent here in a wide arc, the bank broad along this side, the water deep enough down the inner curve to serve as a boundary a hellhound would respect.
"If I draw the flow of the river along the bank," he said, half to them and half to himself, "And set it to hold as a barrier along the eastern edge, it will keep them from scattering into the forest and funnel them toward the middle of the ground."
Nico read the terrain, then nodded once with swift, practiced certainty, absorbing the plan almost the instant it was spoken, "That grants me room to root a stable passage, a straight line down to the Underworld, and there is shadow depth enough at this hour if I work the shade along the bank," his eyes went to the great oak whose roots plunged into the earth at the water margin, the dark beneath it dense even under the full weight of the noon light, "There."
Both of them looked to Artemis.
She regarded the hellhounds for a breath with the stillness of a goddess weighing the most efficient use of divine authority, then tipped her head a fraction, "I shall command them into the passage once it stands," the words came unadorned, less a declaration than a plain acknowledgment of what she could do, "They will answer to divine presence when shadow alone proves too little."
Nico let a long breath slip from him, his expression caught between deep relief and disbelief, as though he had just been told that a trouble he had wrestled for so long was about to dissolve at a single word from a goddess, overcome with gratitude, he bowed a third time, briefer than the last and sincere all the same, "Thank you, my lady."
They moved.
Percy walked to the river edge, crouched at the bank, and laid both palms flat against the surface, the current recognised him at once, the way it always did, the pull of the heritage that flowed within his veins meeting the nature of the water with the familiarity of things that had forever known each other. He asked it to curl along the eastern margin of the bank in a broad arc and to keep that shape with patience rather than force. The river obliged, rising gently along the ground in a smooth, unbroken curve, spreading into a shallow wall that sealed the eastern approach from the forest. One hellhound tested it with an enormous paw, found the running water unpleasant, and withdrew toward the center.
The rest followed the logic of the boundary without a word, sliding away from the water, their scattered motion tightening by degrees toward the middle and the western edge of the bank.
Nico crossed to the foot of the oak, his hands reaching toward the shadow beneath it, the dark stretched and thickened and sank into something that was not the mere absence of light but the presence of something else, a passage taking shape the way passages to the Underworld always did, with the character of a gate that had stood there all along and had only been anticipating the proper hands.
"Ready," he called, his voice taut with the concentration required to hold it stable.
Artemis stepped forward.
The effect was instant, her divine presence settled across the whole bank like the moon emerging from cloud cover, a shift in the very texture of everything, the light altering, the atmosphere drawing tight. The hellhounds went still. Every one of them at once, the aimless circling ceasing, the scattered bodies turning toward her with the instinctive knowledge of beasts that understood, somewhere beneath their confusion, what manner of being had just addressed them.
She uttered a single command.
The tongue was ancient, freighted with the authority of a goddess that had stood present when the world first learned what authority meant. The sound moved across the bank as the moon moves across the night, sinking into all it touched.
The hellhounds turned toward the passage.
One by one, then in clusters, their great forms folding into the shadow Nico had opened with the surprising obedience of beasts that had only needed a divine word to point them where to go. The largest went third, the one that had balked at the river, it halted at the threshold with what struck Percy as a faint, sulfurous reluctance, until the silver gaze of the goddess found it, and it thought better of the matter and stepped within, its head bowed low.
The last crossed into the dark, and the passage held a moment, the shadow full and deep, then Nico loosed it with a slow breath and the darkness drew back beneath the oak, settling into the ordinary sort, the light laying claim to the bank as though nothing uncommon had ever stood upon it.
Silence.
The river murmured along its bed, entirely unbothered. Percy withdrew the current with a flick of his wrist, and the water settled back into its channel with the patient familiarity of something that has been briefly borrowed and returned in good condition.
Nico stood a moment, his breathing evening, then turned to Artemis and bowed a final time, the deepest of the four, his voice weighted with the plain gratitude that spoke how much her aid had meant, "I am in your debt, my lady."
"Convey my regards to your father," she said, studying him with the composed steadiness she kept for the rare thing that satisfied her, "And see that the passage they used is sealed properly."
"It will be done," he said with quiet certainty, as though he were stating a fact rather than offering a promise.
He straightened and looked to Percy, every trace of careful formality entirely absent from his face now, and in its place the honest ease of a cousin raised amid adjacent havoc who had come to hold a real affection for the company, the corners of his eyes creasing faintly, "Thank you, Percy."
"Anytime," Percy said, and meant it in the exact way he always meant it with Nico, without condition, "Tell the others I said hello when you are back at Camp Half Blood."
Nico nodded, then stepped into the shadow and was gone.
Percy lingered at the bank a moment, looking at the place where the passage had stood, then turned toward Artemis. She had turned toward him already, and the composed authority she had worn since the scene first revealed itself had turned into the softer register she kept for the hours when it was only the two of them.
He closed the distance between them and pressed his lips to hers, the kind of kiss that comes without occasion, unbidden and unhurried, her hand finding his lapel and steadying against him through the length of it, then she drew back and settled into step at his side as they turned toward the forest.
The trail wound on through the oaks, the sunlight sliding through its slow afternoon arc above the canopy, and they walked together, exactly as they had been before the forest decided it held other plans for their noon.