The walls were made of car doors.
River counted them as she and Hettie followed the ravine downstreamâdozens of them, welded and bolted and wired together into a barrier maybe eight feet tall, the old paint creating an accidental mosaic of faded blues and greens and silvers. Some still had windows. Some still had mirrors. The effect was disorienting: approaching the Nest meant approaching a wall of fractured reflections, her own face staring back at her from twenty different angles, each one slightly wrong.
"Don't stare at the mirrors," Hettie said. "They use them to watch the approaches. Anybody who stops to look at their own reflection isn't paying attention to what's behind them."
"Clever."
"Paranoid. But paranoid people survive." Hettie adjusted her splinted arm with a wince. "Let me do the talking at the gate. They know me."
"You said you've only been here twice."
"Twice is more than zero, which is what you've got." The old woman's jaw was set against the pain, but her eyes were sharp. "And put your knife away. They see it, they'll assume the worst."
River hesitated. The knife was the one thing between her and everything else.
She sheathed it anyway.
The gate was a section of wall that swung outward on hinges made from truck axlesâheavy, industrial, the kind of hardware that meant someone here knew metalwork. Two people stood on a platform above, built from scaffolding and plywood, looking down. Both held crossbows, the bolts pointed loosely in River and Hettie's general direction. Not aimed. Not lowered, either.
"Hettie Garza." The old woman raised her good hand. "Passed through last spring. Traded a day's labor for water."
One of the guardsâa woman, mid-thirties, with short hair and a scar that ran from her left ear to her collarboneâleaned forward. "I remember. You fixed the south cistern's intake valve."
"Still working?"
"Better than before you touched it." The guard's eyes moved to River. "Who's your friend?"
"Traveler. Found her on the road. She set my arm." Hettie gestured with the splint. "Fell coming down a ridge two days back."
The guard studied River for a long time. River stood still and let herself be studied. She knew what the woman was seeing: a seventeen-year-old in a coat too big for her, skinny, bruised, carrying a pack that was mostly empty. Not a threat. Not obviously useful, either.
"Name?"
"River."
"Full name."
River's teeth clicked together. Full names were currency in the Wastesâinformation that could be traded, sold, used. Grandmother had told her to guard hers. But Grandmother had also told her that people who won't give their name don't get through gates.
"River Nakamura-Blake."
The guard's expression didn't change. If the name meant anything to herâand there was no reason it shouldâshe didn't show it.
"Weapons?"
"Knife. One."
"You'll surrender it at the gate. Get it back when you leave."
"No."
The word came out flat, automatic, before River could think about whether it was smart. The guard's crossbow shiftedânot aiming, but reminding. The second guard, a thin man with a beard that needed attention, adjusted his grip.
"House rules," the guard said. "No outside weapons inside the walls."
"Then I'll stay outside the walls."
"River." Hettie's voice was low, warning. "Don't beâ"
"I'm not giving up my knife." River kept her eyes on the guard. Her voice was steady, which surprised her given what her pulse was doing. "It's the only thing I have that keeps me alive. You want me inside, you let me keep it."
Silence. The wind pushed through the car-door walls, making the mirrors shiver. River's reflections trembled in twenty different panels.
The guard turned to the man beside her. They spoke too quietly for River to hearâquick, clipped exchanges, the shorthand of people who'd worked together long enough to communicate in fragments. Then the guard looked back down.
"Knife stays sheathed. We see it out for any reason that isn't cutting food, you're gone. Both of you. Clear?"
"Clear."
The gate swung open.
---
The Nest was smaller than it looked from outside.
The car-door walls enclosed an area maybe a hundred yards across, centered on the ravine itself. The creek ran through the middle, bridged at two points by planks laid across old shopping carts sunk into the streambed. On either side, shelters had been built from the same automotive salvage as the wallsâhoods and trunks and quarter panels shaped into lean-tos and huts, insulated with blankets and tarps and whatever else kept the wind out.
River counted eighteen people. Maybe more inside the shelters, but eighteen visible: working on the walls, tending a communal fire pit, hauling water from the creek. Children among themâthree that she could see, ranging from a toddler strapped to someone's back to a boy of maybe twelve who was splitting firewood with the competence of someone who'd been doing it for years.
They stared at her. All of them. Not hostile exactly, but calculating. Measuring her against what she might cost them versus what she might be worth.
"Dex!" The guard from the wallâshe'd climbed down and was walking ahead of them nowâcalled toward the largest shelter, a structure built around what looked like the cab of a semi truck. "Visitors. Labor-for-trade."
A man emerged. He was bigânot tall, but wide, with the kind of dense, packed muscle that came from years of physical work rather than any deliberate effort. Forty-ish, dark-skinned, head shaved, hands like shovels. He wore a leather apron over his clothes, the kind a blacksmith might wear, and he smelled like metal and woodsmoke.
"Hettie." He nodded at the old woman. "Back already?"
"Wasn't planning on it." Hettie raised the splinted arm. "But plans and the Wastes don't get along."
"Noticed." His eyes found River. Brown with flecks of green, and they didn't blink. "You're young."
"Everybody keeps telling me that."
"Because it matters. Young means reckless. Reckless gets people killed." He crossed his arms over the leather apron. "What's your trade?"
"Don't have one."
"What can you do?"
River ran through the list in her head. She could walk. She could build a fire. She could field-dress a rabbit and set a broken bone on a goat and, apparently, on a person. She could identify which plants in the Wastes were edible and which would kill you, though the edible list was much shorter. She could fightâsort ofâif the opponent was a dog and she got lucky.
None of that seemed impressive enough to trade for supplies.
"I can work," she said. "Whatever needs doing. I'm stronger than I look."
"Everyone says that." Dex's expression hadn't shifted from its default setting, which was somewhere between skeptical and bored. "The wall needs patching. South section, where the creek undercuts the foundation. It's been sinking for weeks. We need someone to dig out the base, pack it with gravel, and reset the panels before the next heavy rain."
"How heavy are the panels?"
"Sixty, seventy pounds each. Car doors with frames attached."
River's bruised knee throbbed. Her back, still sore from sleeping in culverts, twitched at the thought. Sixty pounds was manageable under normal circumstances. Right nowâhungry, hurt, exhaustedâit was going to be bad.
"What's the pay?"
"Two days' rations for two days' work. Water included. Shelter if you want it." He looked at Hettie. "Same deal for you, but I'll give you light duty. Cooking, mending, that sort of thing."
"How generous." Hettie's voice was dry.
"Take it or leave it." Dex turned back toward the semi-truck shelter. "Start whenever you're ready. Talk to Polk about tools."
He disappeared inside. Conversation over. River stood in the middle of the Nest with eighteen pairs of eyes on her and the taste of creek water still chalky on her tongue.
"Charming," she said.
"He's not here to be charming." The guard from the wall had come up beside them. Close up, the scar was worseâdeep, old, the kind that came from a blade rather than an accident. "I'm Luce. I run security. Anything you need, you come to me or Dex. Don't bother anyone else."
"Don't bother anyone," River repeated. "Got it."
"I mean it. These people have been through things. Some of them don't handle strangers well." Luce's voice dropped. "The woman by the fire pitâMaren. Don't talk to her. Don't approach her. Don't make eye contact if you can help it."
River glanced toward the fire pit. A woman sat beside it, motionless, wrapped in blankets despite the day's relative warmth. She was staring into the flames with the kind of fixed, empty focus that River recognized. She'd seen it in the village, after raider attacks and plague outbreaks. Someone whose mind had gone somewhere else and might not be coming back.
"What happened to her?"
"Not your business." Luce's tone closed the subject. "Polk's in the workshop. South side. He'll get you started."
---
Polk was the twelve-year-old splitting firewood.
River stared at him. He stared back. He had the unimpressed look of a child who'd been doing adult work long enough to consider adults his professional equals, and finding most of them lacking.
"You're the new labor," he said. Not a question.
"You're the one with the tools."
"I'm the one with *all* the tools." He set down the splitting axeâa real one, sharp, the handle worn smooth from useâand wiped his hands on his pants. "You know masonry?"
"I know how to stack rocks."
"Close enough." He led her to the south section of the wall, where the car-door panels leaned inward at an angle that made River's stomach clench. The creek had been eating the ground beneath them, slowly, patient the way water always was. The foundationârocks and packed dirtâhad eroded into a concave scoop, and the panels above it were settling, pulling away from their neighbors, leaving gaps that the wind whistled through.
"Dig out the bad foundation," Polk said, pointing. "Down to solid ground. Then pack it with gravelâthere's a pile by the north gate. Reset the panels, brace them with the posts I'll bring you." He studied her with those too-old eyes. "Can you lift a car door?"
"Guess we'll find out."
He brought her a shovelâreal metal, with a wooden handle that had been replaced at least twice judging by the rings of wire holding it togetherâand left her to it. River stripped off Grandmother's coat, folded it carefully on a dry patch of ground, and started digging.
---
The work was exactly as bad as she'd expected.
The foundation soil was clay and gravel and root matter, compacted by years of weight and water. Each shovelful was a fight. Her knee sang every time she drove the blade down with her foot. Her arms, which had felt adequate that morning, were burning by the first hour.
She dug anyway.
The rhythm helpedâthe mindless repetition of dig, lift, dump. Same principle as walking. The body could do things the mind couldn't contemplate, as long as you broke them into small enough pieces.
Other Nest residents passed by as she worked. Most ignored her. A few watched for a minute or two, then moved on. Polk appeared periodically to check her progress, each time with a slight nod that might have been approval or might have been calculation.
Around midday, a woman brought her water and a bowl of something that was either soup or gruelâthin, gray-brown, flecked with what might have been vegetable matter. River drank the water and ate the soup-gruel and didn't ask what was in it.
"You're doing it wrong," the woman said.
River looked up. The woman was maybe thirty, angular, with hands that were cracked and red from washing. Her face was narrow, watchful. She was looking at the foundation hole River had dug.
"Too shallow on the upstream side. Water'll get under it again inside a month." She pointed. "You need to angle the base so it slopes away from the wall. Channels the runoff into the creek instead of letting it pool."
River looked at the hole. The woman was right. The upstream side was the same depth as the rest, which meant the water would find the path of least resistance and end up right back where it started.
"Thanks," River said.
"Don't thank me. Thank me by doing it right. I'm the one who has to live behind this wall." The woman's tone was practical rather than hostile. "I'm Nell."
"River."
"I know. Word gets around fast when there are only eighteen of us." Nell squatted beside the hole, studying the soil with the practiced eye of someone who understood dirt. "You a farmer? Before?"
"My grandmother was. Sort of. We grew what we could."
"Where?"
River hesitated. Naming the village felt dangerous. Naming it meant connecting herself to a place the Crimson Riders had destroyed, and that connection could draw attention she didn't want.
"South," she said. "Small village. It's gone now."
Nell didn't press. She stood, brushed her hands on her pants, and walked away. Then stopped. Turned back.
"The angle thingâit's not just about water. The foundation stays drier, which means the posts don't rot. My father was a civil engineer. Before." She said the word the same way Hettie said it, the same way everyone who remembered said itâlike a proper noun, a name for a lost country. "One of the only useful things he taught me."
She left. River adjusted her dig, angling the upstream base outward, and kept working.
---
By late afternoon, the foundation was exposed and reshaped. River's hands were rawâblisters on both palms, one already torn open and bleeding into the clay. Her knee had graduated from aching to hostile. Her shoulders felt wrecked.
Polk brought the gravel in a wheelbarrow. He watched while River packed it into the foundation bed, tamping it with the flat of the shovel until it was dense and level.
"Not bad," he said. First words of approval she'd gotten since arriving. "Posts are over there. Panels are heavy. Want help?"
"I've got it."
She didn't have it. The first car-door panel weighed every ounce of its seventy pounds, and lifting it into position required her to hold it overhead while she kicked the bracing post into place. Her arms shook. Her vision went white at the edges. The panel slipped, caught on the post, and settled into position with a metallic groan.
Three more to go.
She got through the second one. The third panel slipped when her blistered hand gave out, the raw skin skidding across the metal edge. She yelpedâcouldn't help itâand jerked her hand back, leaving a smear of blood on the door's faded blue paint. The panel swung free, and she barely scrambled backward before it crashed into the dirt.
"Ash and dust," she hissed, cradling her hand. The blister had torn completely, a flap of skin hanging loose, the flesh beneath pink and weeping.
Polk appeared. Looked at the fallen panel. Looked at her hand. Looked at her face, which she was working hard to keep neutral.
"I'll get Dex," he said.
"Don't." River straightened. Flexed her hand. The pain was bright, specific, demanding all her attention. "I said I'd do the work. I'm doing the work."
"You're bleeding on the wall."
"Then it'll match the rest of the Wastes."
Polk's mouth twitched. Not quite a smile. More like the beginning of one that got intercepted by twelve years of practiced stoicism. He picked up one end of the fallen panel.
"Grab the other side," he said. "I'm not doing this for you. I'm doing it because Dex will blame me if the panel's dented."
Together, they lifted the panel into place. Then the fourth one. The bracing posts went in, and Polk produced a hammer and a coffee can full of salvaged nailsâreal nails, straightened from old use, preciousâand they nailed the braces to the panels and the panels to the posts and the posts to the foundation.
When it was done, the south wall stood straight. Solid. Better than it had been before.
River sat in the dirt beside it and wrapped her bleeding hand in a strip torn from the hem of her shirt. She was shakingânot from cold this time but from a body that had given everything it had and was coasting on nothing.
Polk handed her a cup of water. She drank it in one pull.
"You're stronger than you look," he said.
"Everybody keeps telling me that, too."
---
Evening. The communal fire. River sat with Hettie, who had spent the day mending clothes and was now eating the Nest's version of dinnerâa stew of root vegetables and unidentifiable protein that was better than dog meat and worse than anything Grandmother had ever cooked.
"Your hand needs poultice," Hettie said, looking at the makeshift bandage.
"It needs a week of rest and real bandages. It's getting a dirty strip of shirt and tomorrow's work."
"Stubborn girl."
"You've mentioned."
They ate. The fire cracked and popped. Around them, the Nest's residents went through their evening routinesâPolk sharpening tools by firelight, Nell washing bowls in creek water, Luce making her rounds along the wall's platforms, checking sight lines and mirror angles.
Maren sat by the fire. She hadn't moved, as far as River could tell, since morning. Someone had brought her food. The bowl sat untouched beside her.
"Hettie."
"Mm."
"What's north of here? Past the Nest, past the creek. What's between here and the mountains?"
Hettie chewed slowly. "Depends which way you go. West route takes you through what they used to call the Rust Beltâold factories, steel mills, the kind of industrial ruins that attract scavengers and worse. Dangerous, but passable if you're careful."
"And the east route?"
The old woman's chewing slowed. "The Bone Road."
"Sounds inviting."
"It's what the traders call it. Old interstate, runs north through dead country. Nothing grows, nothing lives. The soil was poisoned by something in the first yearsâchemical spill, maybe, or something worse. Traders use it because it's fast and mostly empty. But 'mostly' is doing a lot of work in that sentence."
"What's on it?"
"Besides dead earth and bad memories?" Hettie set down her bowl. "The Riders use it. As a supply route. Patrols run up and down it every few days, resupplying their outposts in the northern territories."
River went still. The Riders. The same Riders who'd burned her village, who she'd seen on the highway two days ago. Using the fastest route north as a supply corridor.
"How often?"
"I've heard different things from different people. Some say every three days. Some say random. Depends on what they're moving and where they need it." Hettie met her eyes. "You're thinking about using it."
"I'm thinking it's the fastest way north."
"Fastest way to die, too." Hettie's voice hardened. "The Bone Road is open ground. Flat. No cover for miles. If a Rider patrol spots youâ"
"I know what happens if they spot me."
Silence. The fire snapped. Maren's untouched bowl gleamed in the light.
"There might be a third way," Hettie said, quieter now. "Through the rail yard, north of the creek. Old freight line that runs up through hill country. The rails are goneâstripped for metal years agoâbut the rail bed is still intact. Goes through tunnels, cuts, terrain that's hard to patrol because you can't get vehicles through it. Slower than the road, but safer. Maybe."
"You've been through it?"
"Once. Years ago. It was passable then. Things change." Hettie picked up her bowl again. "But it's what I'd take, if I were seventeen and alone and heading somewhere I wasn't sure existed."
River stared into the fire. Three routes north. The dangerous one, the deadly one, and the unknown one.
"I'll leave tomorrow," she said. "After I finish the second day's work."
"Dex won't like that. He'll want to get every hour he paid for."
"Then Dex can take it up with me." River flexed her bandaged hand. It stung. "I need supplies, not a permanent address."
Hettie was quiet for a moment. Then: "I'm not going with you."
River looked at her.
"My arm needs weeks to heal. I can't walk the kind of terrain you're talking about. I'll slow you down, and we both know what slow means out there." The old woman's face was matter-of-fact. No self-pity. Just math. The same math River had done in Millhaven, standing in the basement with her cans and her knife, calculating whether helping a stranger was worth the cost. "I'll stay here. Work my way. Dex can always use someone who knows plumbing."
"Hettieâ"
"Don't." The word was sharp. "Don't make it something it isn't. You helped me. I helped you. Now you go north and I stay here and that's how the Wastes work."
River's throat tightened. She swallowed. Nodded.
"The rail line," she said. "How do I find the entrance?"
"Follow the creek upstream about two miles past the north end of the ravine. There's an old switching yardâyou'll see the signal towers, rusted but still standing. The main line heads north from there. Stay on the rail bed. Don't go into the tunnels at night."
"Why not?"
Hettie's mouth pressed thin. "Because things live in them. Things that used to be animals, maybe. The traders have stories. I don't know what's true and what's campfire talk, but the smart money is on not finding out in the dark."
River filed this away with everything elseâthe Bone Road, the Riders' patrols, the Nest, the route. Her mental map was growing, filling in the blank spaces with names and warnings and the kind of detail you couldn't get from a piece of leather scratched with a nail.
"Hettie."
"What."
"Thank you."
The old woman looked at her. Those washed-out blue eyes, rheumy with pain and age. For a moment, something softened in her faceâbrief, almost involuntary.
"Don't die out there," Hettie said. "That's all the thanks I need."
---
River slept in the shelter they'd assigned herâa lean-to made from a minivan's sliding door and some plywood, warmer than a culvert, almost comfortable. She dreamed about the village. Not the burning. Before that. The ordinary days, the ones she'd never thought to memorize. Grandmother hanging laundry. Kenji's laugh. The smell of bread from Mrs. Oba's kitchen.
She woke once, in the deep part of the night, to the sound of someone crying. Not Marenâthe sound came from outside the walls, somewhere in the ravine beyond the Nest's perimeter. A high, thin sound, more animal than human. Maybe it was an animal. Maybe it wasn't.
Nobody in the Nest stirred. They'd heard it before, whatever it was.
River lay in the dark, listening, until the crying stopped.
Then she rolled over, pressed her face into Grandmother's coat, and waited for morning.
Outside the walls, something scraped against metal. Slow. Deliberate. Testing.
Luce's voice, sharp and sudden from the platform above: "Contact south. Twoâno, three. Moving along the tree line."
The Nest woke up.