They made camp that evening in a willow thicket on the near bank, far enough from the river that the snipers' range couldn't reach them. Joel coaxed a small fire out of damp kindling, feeding it twig by twig until it held. Ethan sat with his wounded leg stretched toward the meager warmth, cleaning river grit out of his crossbow's mechanism.
"We put distance between us and this river," Joel said, eyes on the far treeline even in the failing light. "They'll send patrols to find another crossing. We move at first light."
Ethan nodded, already tracing the route in his head — the foothills rising west of them, rockier, denser, slower going. "Through the foothills, then. More cover, but the climbing will cost us time."
The days that followed were a blur of ascent and careful descent. The air thinned and cooled as they climbed. Ethan's leg held, but every incline was a negotiation — Joel's hand under his elbow on the steep parts, steady and unasked. Ellie scouted ahead, her small figure darting through the undergrowth, coming back with hand signals and quick, quiet reports. They talked less and understood more.
One evening they camped in a narrow rocky crevice, the sun bleeding out behind jagged peaks. Joel tended the fire. Ellie unpacked their rations — and then crawled over to where Ethan sat with his crossbow across his knees, pulling a battered notepad and a pencil stub from her pack.
"What're you doing?" she asked. "You've got that look. Like you're building something in your head."
"Running through what's ahead." Ethan set the crossbow down. "Terrain. Tommy. What we might walk into."
She was quiet a moment, gnawing her lip. Then: "Back in the crypt you said you know things about before. Not from books. Like you just — remember it. How?"
Ethan's hand stilled. He'd known this question would come back. He looked at the fire, then at her open face, and chose the truest thing he could give her that wasn't the whole truth.
"It's not like remembering a dream," he said slowly. "It's more like — a blueprint. In my head. How things used to work. The logic of machines, the way people build systems. Like I've studied it all my life." He met her eyes. "Sometimes it feels like the information just — arrives. When I need it. Like I just know."
Ellie stared at him, then glanced down at her own arm, at the faded bite mark there. "Is that part of why you're immune? Some extra thing?"
"I don't know why I'm immune." Ethan shook his head. "That's what I'm trying to find out. Nightingale — my parents — maybe they were part of understanding it. This other thing, the knowing — it just came with it. A side effect, maybe."
She thought about that, brow furrowed. "Does Joel know?"
"No." Ethan's voice went firm. "And he can't. He'd never understand it — he'd just see something dangerous. This stays between us. You and me. Got it?"
Ellie reached out and found his hand in the firelight, her fingers closing around his — brief, warm, certain. "Got it," she whispered. "Our secret. I won't tell him. Promise."
Across the fire, Joel watched them — Ellie's serious face, their joined hands. He couldn't hear the words, but he didn't need to. A low sigh escaped him. He trusted the kid with their lives. This was different country, and he didn't like it — but he couldn't deny what it did for her, the way some of the wariness left her shoulders. He banked the fire and resolved, silently, to watch them closer.
The next day the climbing turned serious — a sheer rock face, wind howling across it, the valley dropping away below. Joel went first, testing holds, the long rifle slung tight across his pack and his shotgun in his hand, then reaching back to haul the others up pitch by pitch. Ellie climbed like she was made for it, finding footholds in cracks Joel's bigger hands couldn't use.
Ethan was midway across a difficult traverse, fingers numb on cold stone, when it hit him — a faint metallic tang on the wind, and under it, through the rock itself, the disciplined rhythm of movement. Not infected. Boots. Spacing.
"Hold!" he shouted against the wind, flattening himself to the face. "Ridge above us. Soldiers. Three of them, patrolling."
Joel clung to a handhold below, head snapping up. "Soldiers? FEDRA? Out here?"
"Too disciplined for scavengers," Ethan said, picking out the camouflaged outlines against the ridgeline. "We're directly in their path. We can't go up, we can't go back."
Ellie pressed herself to a narrow ledge beside him, face pale. "Can we hide? If we stay still —"
"Too close. Wind shifts and they'll smell us." Ethan scanned the rock above — and found it: a cluster of boulders balanced precariously on the cliff face, one great flat slab leaning out over nothing. And below them, half-hidden by scrub, a dark mouth in the mountainside. A cave. Maybe fifty yards down. Rough, but real. "That slab up there — it's barely holding. Joel, your rifle. Base of the slab. One precise shot and gravity does the rest. It'll pull every eye on that ridge."
"It's a long shot," Joel said grimly. "And loud. They'll know we're here."
"They already know something's here," Ethan said. "The louder it is, the further it pulls them from our position. When the rock starts moving, we go down — that cave mouth below us. Ellie first."
Joel looked at the slab, then at the cave, then nodded once. He unslung the long rifle from his pack with slow, deliberate movements and settled it against his shoulder, cheek to the stock.
Ethan found Ellie's hand on the rock beside him and squeezed it once. "When Joel fires, you go. Down into that cave. Don't wait. Just go."
She nodded, her grip tightening and releasing. "You'd better be right behind me."
Joel breathed out, slow and steady against the wind, and squeezed the trigger.
The rifle cracked across the mountains — a deafening report — and an instant later the sharp thwack of the bullet striking stone. Silence. Then a low groan, and the great slab shifted, tipped, and let go, tearing down the cliff face in a devastating avalanche of rock and dust that buried the slope below in thunder.
On the ridge, the soldiers shouted in alarm, their weapons swinging toward the rockslide, away from the three figures frozen on the rock face.
"Go!" Joel roared.
Ellie scrambled down the slope and vanished into the cave's dark mouth. Joel unslung his shotgun and fired twice toward the ridge, keeping the soldiers' heads down, then waved Ethan on. Ethan half-climbed, half-slid down the treacherous rock, his leg protesting every yard, and tumbled through the entrance into sudden darkness. Joel came in right behind him, dragging the thick thorny vines back across the mouth, sealing them in.
The cave smelled of damp earth and old dust. Their breathing filled it, ragged and loud.
In the dark, Ellie's hand found Ethan's. "Are you okay?" she whispered. "That was too close. I thought — "
"I'm here," he said.
Joel's flashlight clicked on, the beam cutting across their dust-streaked faces. He looked at the two of them — hands clasped, breathing hard — and a tired, wry smile touched his mouth.
"You two," he said. "Nothing but trouble. But you always find a way out."
Outside, the mountain settled with a last shudder of falling stone. The vines hung still over the cave mouth. And in the dark, with the dust still sifting down around them, none of them moved.