The dawn is double: a twin smoky glow at the horizon and behind us, above the trees, where the fire continues to smolder. The clouds and the drifts of black smoke are almost indistinguishable.

In the dark, and the confusion, we didn’t realize we were missing two members of our group: Pike and Henley. Dani wants to go back and look for their bodies, but the fire makes it impossible. We can’t even go back to forage for cans that will not have burned, and supplies that have made it through the flames.

Instead, as soon as the sky is light, we push forward.

We walk in silence, in a straight line, our eyes trained on the ground. We must get to the camp at Waterbury as soon as possible—no detours, no resting, no explorations of the ruins of old towns, picked clean of useful supplies long ago. The air is charged with anxiety.

We can count ourselves lucky for one thing: that Raven’s map was with Julian and Tack and has not been destroyed with the rest of our supplies.

Tack and Julian walk together at the front of the line, occasionally stopping to consult notations they’ve made on the map. Despite everything that has happened, it gives me a rush of pride to watch Tack consulting Julian, and a different kind of pleasure too—vindication, because I know Alex will also have noticed.

Alex, of course, takes up the rear with Coral.

It’s a warm day—so warm that I have removed my jacket and rolled my long-sleeved shirt to the elbows—and the sun is splashed liberally over the ground. It’s almost impossible to believe that only hours ago we were attacked, except that Pike’s and Henley’s voices are missing from the murmured conversation.

Julian is ahead of me. Alex is behind me. So I push forward—exhausted, my mouth still full of the taste of smoke, my lungs burning.

Waterbury, Lu has told us, is the beginning of a new order. An enormous camp has amassed outside the city’s wall, and many of the city’s Valid residents have fled. Portions of Waterbury have been totally evacuated; other parts of the city are barricaded against the Invalids on the other side.

Lu has heard that the Invalid camp is almost like a city itself: Everyone pitches in, everyone helps repair shelters and hunt for food and gather water. It has so far been safe from retaliation, partly because no one has remained who can retaliate. The municipal offices were destroyed, and the mayor and his deputies were chased out.

There, we’ll build shelters out of branches and salvaged brick, and finally find a place for ourselves.

In Waterbury, everything will be okay.

The trees begin to thin, and we pass old, graffiti-covered benches and half-shell underpasses, speckled with mold; a roof, intact, sitting on a field of grass, as though the rest of the house has been simply suctioned underground; stretches of road that, leading nowhere, are now part of a nonsense-grammar. This is the language of the world before—a world of chaos and confusion and happiness and despair—before the blitz turned streets to grids, cities to prisons, and hearts to dust.

We know we’re getting close.

In the evening, when the sun begins to set, the anxiety comes sweeping back. None of us wants to spend another night alone, exposed, in the Wilds, even if we have managed to put the regulators off our trail for now.

From ahead, there is a shout. Julian has circled away from Tack and fallen into step beside me, although we have been mostly walking in silence.

“What is it?” I ask him. I’m so tired I am numb. I can’t see past the people ahead of me. The group is fanning out over what looks as though it was once an old parking lot. Most of the pavement is gone. Two streetlamps, empty of lightbulbs, are staked into the ground. Next to one of them, Tack and Raven have both stopped.

Julian cranes onto his tiptoes. “I think…I think we’re there.” Even before he finishes speaking, I am pushing through the group, angling for a look.

At the edge of the old parking lot, the ground drops away suddenly and cuts sharply downward. A series of switchback trails leads down the hillside to a barren, treeless portion of land.

The camp is not like I’ve envisioned it at all. I’ve been imagining real houses, or at least solid structures, nestled between trees. This is simply a vast, teeming field, a patchwork of blankets and trash, and hundreds and hundreds of people, pushing almost directly up against the city’s wall, stained red in the dying light. Fires burn sporadically across the great, dark expense, winking like lights from a distant city. The sky, electric at the horizon, is otherwise stretched dark and tight, like a metal lid that has been screwed shut over waste.

For a moment I flash back to the twisted underground people Julian and I met when we were trying to escape the Scavengers, and their grimy, smoky, underground world.

I’ve never seen so many Invalids. I have never seen so many people, period.

Even from here, we can smell them.

My chest feels like it has caved in.

“What is this place?” Julian mutters. I want to say something to comfort him—I want to tell him it will be okay—but I feel weighted down, dull with disappointment.

“This is it?” Dani is the one to voice what we must all be feeling. “This is the big dream? The new order?”

“We have friends here, at least,” Hunter says quietly. But even he can’t keep up the act. He shoves a hand through his hair so it sticks up in all directions. His face is white; all day, he has been hacking as he walked, his breath coming wet and ragged. “And we had no choice, anyway.”

“We could have gone to Canada, like Gordo said.”

“We wouldn’t have made it there without our supplies,” Hunter says.

“We would still have our supplies if we had headed north in the first place,” Dani fires back.

“Well, we didn’t. We’re here. And I don’t know about you guys, but I’m thirsty as hell.” Alex pushes his way through the line. He has to sidestep down the hill to the first switchback trail, sliding a little on the sleep slope, sending a spray of gravel skidding down toward the camp.

He pauses when he reaches the path and looks back up at us. “Well? Are you coming?” His eyes slide over the whole group. When he looks at me, a small shock pulses through me, and I quickly drop my eyes. For a split second, he had looked almost like my Alex again.

Raven and Tack move forward together. Alex is right about one thing—we don’t have a choice now. We won’t make it another few days in the Wilds, not without any traps, or supplies, and vessels to boil our water. The rest of the group must know this, because they follow Raven and Tack, sidestepping down toward the dirt path one after another. Dani mutters something under her breath, but follows at last.

“Come on.” I reach for Julian’s hand.

He draws back. His eyes are fixed on the vast, smoky plain below us, and the dingy patchwork of blankets and makeshift tents. For a moment, I think he’s going to refuse. Then he jerks forward, as though pushing his way through an invisible barrier, and precedes me down the hill.

At the last second, I notice that Lu is still standing on the ridge. She looks tiny, dwarfed by the enormous evergreens behind her. Her hair is nearly down to her waist now. She is staring not at the camp, but at the wall beyond it: the stained-red stone that marks the beginning of the other world. The zombie world.

“You coming, Lu?” I say.

“What?” She looks startled, as though I’ve woken her up. Then, immediately: “I’m coming.” She casts one more look at the wall before following us. Her face is troubled.

The city of Waterbury looks, at least from this distance, dead: no smoke floats up from the factory chimneys; no lights shine from the darkened, glass-enclosed towers. It is the empty husk of a city, almost like the ruins we pass in the Wilds. Except this time, the ruin is on the other side of the walls.

And I wonder what about it, exactly, makes Lu afraid.

Once we reach the ground, the smell is thick, almost unbearable: the stink of thousands of unwashed bodies and unwashed, hungry mouths; urine; old fires and tobacco. Julian coughs, mutters, “God.” I bring my sleeve to my mouth, trying to inhale through it.

The periphery of the camp is ringed with large metal drums and old, rust-spotted trash cans, in which fires have been lit. People crowd around the fires, cooking or warming their hands. They look at us with suspicion as we pass. Immediately, I can tell that we are not welcome.

Even Raven looks uncertain. It’s not clear where we should go, or who we should speak to, or whether the camp is organized at all. As the sun is finally swallowed by the horizon, the crowd becomes a mass of shadows: faces lit up, grotesque and contorted by the flickering light. Shelters have been constructed hastily from bits of corrugated tin and scraps of metal; other people have created makeshift tents with dirty bedsheets. Still others are lying, huddled, on the ground, pressing against one another for warmth.

“Well?” Dani says. Her voice is loud, a challenge. “What now?”

Raven is about to respond when suddenly a body rockets into her, nearly pushing her over. Tack reaches out to steady her, barks, “Hey!”

The boy who catapulted into Raven—skinny, with the jutting jaw of a bulldog—doesn’t even glance at her. Already, he is plowing back toward a dingy red tent, where a small crowd has assembled. A man—older, bare-chested but wearing a long, flapping winter coat—is standing with his fists balled, his face screwed up with fury.

“You filthy pig!” he spits. “I’m going to fucking kill you.”

“Are you crazy?” Bulldog’s voice is surprisingly shrill. “What the hell are you—”

“You stole my goddamn can. Admit it. You stole my can.” Bits of spit are collected at the corners of the old man’s mouth. His eyes are wide, wild. He turns a full circle, appealing to the crowd. Then he raises his voice. “I had a whole can of tuna, unopened. Sitting right with my things. He stole it.”

“I never touched it. You’re out of your mind.” Bulldog starts to turn away. The man in the ragged coat lets out a roar of fury.

“Liar!”

He leaps. For a second, it seems he is suspended in midair, his coat flapping behind him like the great leathery wings of a bat. Then he lands on the boy’s back, pinning him to the ground. All at once the crowd is a surge, shouting, pressing forward, cheering them on. The boy rolls on top of the man, straddling him, pounding him. Then the older man kicks him off and wrestles the boy’s face into the dirt. He is shouting, but his words are unintelligible. The boy thrashes and manages to buck the old man off, sending him into the side of a metal drum. The man screams. The fire has obviously been burning for a long time. The metal must be hot.

Someone shoves me from behind, and I nearly go sprawling to the ground. Julian just manages to get his hand around my arm, keeping me on my feet. The crowd is seething now: The voices and bodies have become one, like dark water teeming with a many-headed, many-armed monster.

This is not freedom. This is not the new world we imagined. It can’t be. This is a nightmare.

I push through the crowd after Julian, who never lets go of my hand. It’s like moving through a violent tide, a surge of different currents. I’m terrified that we’ve lost the others, but then I see Tack, Raven, Coral, and Alex, standing a little ways off, scanning the crowd for the rest of our group. Dani, Bram, Hunter, and Lu fight their way to us.

We huddle close together and wait for the others. I scan the crowd for Gordo, for his chest-length beard, but all I see is blur and haze, faces merging in and out behind clouds of oily smoke. Coral begins to cough.

The others don’t come. Eventually we are forced to admit that we’ve been separated from them. Raven says, halfheartedly, that they will no doubt track us down. We need to find somewhere we can safely camp, and someone who might be willing to share food and water.

We ask four different people before we find one who will help us. A girl—probably no more than twelve or thirteen, and dressed in clothes so filthy they have all turned a uniform, dingy gray—directs us to speak to Pippa, and gestures to a portion of the camp illuminated more brightly than the rest. As we make our way toward the place she indicated, I can feel the young girl watching us. I turn around once to look at her. She has a blanket pulled over her head, and her face is fluid with shadows, but her eyes are enormous, luminous. I think of Grace and feel a sharp pain in my chest.

It seems the camp is actually subdivided into little areas, each claimed by a different person or group of people. As we push toward the series of small campfires that apparently mark the beginning of Pippa’s domain, we hear dozens of fights breaking out over borders and boundaries, property and possessions.

Suddenly Raven lets out a shout of recognition. “Twiggy!” she cries, and breaks into a run. I see her barrel into a woman’s arms—the first time I have ever seen Raven voluntarily embrace anyone besides Tack—and when she pulls away, they both begin talking and laughing at once.

“Tack,” Raven is saying, “you remember Twiggy! You were with us—what?—three summers ago?”

“Four,” the woman corrects her, laughing. She is probably thirty, and her nickname must be ironic. She’s built like a man: heavy, with broad shoulders and no hips. Her hair is cropped close to her scalp. She has a man’s laugh, too, deep and full-throated. I like her immediately. “I’ve got a new name now, you know,” she says, and winks. “Around here, people call me Pippa.”

The bit of land Pippa has claimed for herself is larger and better organized than anything we have yet seen in the camp. There is real shelter: Pippa has constructed, or claimed, a large wooden shed with a roof, enclosed on three sides. Inside the hut are several crudely made benches, a half-dozen battery-operated lanterns, piles of blankets, and two refrigerators—one large, kitchen-sized, and one miniature—both chained shut and padlocked. Pippa tells us that this is where she keeps the food and medical supplies she has managed to gather. She has, additionally, recruited several people to man the campfires constantly, boil the water, and keep out anybody with an inclination to steal.

“You wouldn’t believe the shit I’ve seen around here,” she says. “Last week someone was killed over a goddamn cigarette. It’s crazy.” She shakes her head. “No wonder the zombies didn’t bother bombing us. Waste of ammunition. We’ll kill each other off just fine at this rate.” She gestures for us to sit on the ground. “Might as well park here for a bit. I’ll get some food on. There isn’t a lot. I was expecting a new delivery. We’ve been getting help from the resistance. But something must have happened.”

“Patrols,” Alex says. “There were regulators just south of here. We ran into a group of them.”

Pippa doesn’t seem surprised. She must have already known that the Wilds have been breached. “No wonder you all look like shit,” she says mildly. “Go on. Kitchen’s about to open. Take a load off.”

Julian is very quiet. I can feel the tension in his body. He keeps looking around as though he expects someone to leap out at him from the shadows. Now that we are on this side of the campfires, encircled by warmth and light, the rest of the camp looks like a shadowy blur: a writhing, roiling darkness, swelling with animal sounds.

I can only imagine what he must think of this place, what he must think of us. This is the vision of the world that he has always been warned against: a world of the disease is a world of chaos and filth, selfishness and disorder.

I feel unjustifiably angry with him. His presence, his anxiety, is a reminder that there is a difference between his people and mine.

Tack and Raven have claimed one of the benches. Dani, Lu, Hunter, and Bram squeeze onto the other one. Julian and I take a seat on the ground. Alex remains standing. Coral sits directly in front of him, and I try not to pay attention to the fact that she is leaning back, resting against his shins, and the back of her head is touching his knee.

Pippa removes a key from around her neck and unlocks the large refrigerator. Inside it are rows and rows of canned food, as well as bags of rice. The bottom shelves are packed with bandages, antibacterial ointment, and bottles of ibuprofen. As Pippa moves, she tells us about the camp, and the riots in Waterbury that led to its creation.

“Started in the streets,” she explains as she dumps rice into a large, dented pot. “Kids, mostly. Uncureds. Some of them were riled up by the sympathizers, and we got some members of the R in as moles, too, to keep everybody fired up.”

She moves precisely, without wasting any energy. People materialize out of the dark to help her. Soon she has placed various pots on one of the fires at the periphery. Smoke—delicious, threaded with food smells—drifts back to us.

Immediately there is a shift, a difference in the darkness that surrounds us: A circle of people has gathered, a wall of dark, hungry eyes. Two of Pippa’s men stand guard over the pots, knives drawn.

I shiver. Julian doesn’t put his arm around me.

We eat rice and beans straight out of a communal pot, using our hands. Pippa never stops moving. She walks with her neck jutting forward, as though she constantly expects to encounter a barrier and intends to head-butt her way through it. She doesn’t stop talking, either.

“The R sent me here,” she says. Raven has asked her how she came to be in Waterbury. “After all the riots in the city, we thought we had a good chance to organize a protest, plan a large-scale opposition. There are two thousand people in the camp right now, give or take. That’s a lot of manpower.”

“How’s it going?” Raven asks.

Pippa squats by the campfire and spits. “How does it look like it’s going? I’ve been here a month and I’ve found maybe a hundred people who care about the cause, who are willing to fight. The rest are too scared, too tired, or too beat down. Or they just don’t care.”

“So what are you going to do?” Raven asks.

Pippa spreads her hands. “What can I do? I can’t force them to get involved, and I can’t tell people what to do. This isn’t Zombieland, right?”

I must be making a face, because she looks at me sharply.

“What?” she says.

I look at Raven for guidance, but her face is impassive. I look back to Pippa. “There must be some way…” I venture.

“You think so?” Her voice gets a hard edge. “How? I have no money; I can’t bribe them. We don’t have enough force to threaten them. I can’t convince them if they won’t listen. Welcome to the free world. We give people the power to choose. They can even choose the wrong thing. Beautiful, isn’t it?” She stands abruptly and moves away from the fire. When she speaks again, her voice is composed. “I don’t know what will happen. I’m waiting for word from higher up. It might be better to move on, leave this place to rot. At least we’re safe for the moment.”

“What about fears of attack?” Tack says. “You don’t think that the city will retaliate?”

Pippa shakes her head. “The city was mostly evacuated after the riots.” Her mouth quirks into a small smile. “Fear of contagion—the deliria spreading through the streets, turning us all into animals.” Then the smile fades. “I’m telling you something. The things I’ve seen here…They might be right.”

She takes the stack of blankets and passes them to Raven. “Here. Make yourself useful. You’ll have to share. The blankets are even harder to keep around than the pots. Bed down wherever you can find the space. Don’t wander too far, though. There are some crazies around here. I’ve seen it all—botched procedures, loons, criminals, the lot. Sweet dreams, kiddies.”

It’s only when Pippa mentions sleep that I realize how exhausted I am. It has been more than thirty-six hours since I’ve slept, and until now I have been fueled primarily by fear of what will happen to us. Now my body is leaden. Julian has to help me to my feet. I follow him like a sleepwalker, blindly, hardly conscious of my surroundings. We move away from the three-sided hut.

Julian stops by a campfire that has been allowed to burn out. We are at the very base of the hill, and here the slope is even steeper than the one we came down, and no path has been beaten in its side.

I don’t care about the hardness of the ground, the bite of the frost, the continued shouts and hoots from all around us, a darkness alive and menacing. As Julian settles behind me and wraps the blankets around us both, I’m already somewhere else: I am at the old homestead, in the sickroom, and Grace is there, speaking to me, saying my name over and over. But her voice is drowned out by the fluttering of black wings, and when I look up I see that the roof has been blown apart by the regulators’ bombs, and instead of a ceiling there is only the dark night sky, and thousands and thousands of bats, blotting out the moon.