"The only thing is, there're these kids." And I tell him about Micah and Alyssa, the business with the sword, and he says sure, he says he'll look into it. We're talking quietly, carefully, not moving much, McGully's angry energy still buzzing around the room.

I tear the relevant piece of paper from my notebook, and Culverson tucks it into his shirt pocket.

"Go on ahead, Henry. Solve your case," he says. "Get it right."

I sit on my bus bench across the street from Next Time Around, the vintage clothing store, for thirty seconds, a minute maybe, gathering my nerve. Then I stand up, march over there, and knock on the front door.

No one answers. I stand there like a dummy. Somewhere farther down Wilson Avenue there's a loud, muffled clang, like someone banging two trash can lids together. I knock again, harder this time, loud enough to rattle the glass panes of the door. I know they're in there. I'm bending to peek in the curtained window when the door is jerked open and here's the fat young man with the greasy hair, wearing a wool cap despite the heat.

"Yeah?" he grunts. "What?"

"My name is Henry Palace," I begin, and Nico rushes over, rushes right around this guy's hunched frame to hug me like a maniac.

"Henry!" she says. "What the hell?" But she's happy, grinning, stepping back to look at me and then forward to hug me again. I take a look at her, too, take her in, my sister: a man's white undershirt and camouflage pants, an American Spirit hanging like a lollipop stick from the corner of her mouth. Her hair has been cut short and choppy and dyed black; the change is dramatic and entirely for the worse. But her eyes are the same, twinkling and wicked and brilliant.

"I knew it," she says, looks up at my face, still grinning. "I knew I hadn't seen the last of you."

I don't reply, I smile, I peer past her into the cluttered room, the rolling racks and overspilling bins of clothes, the mannequins arranged in a variety of obscene poses. There's a man in there on the floor asleep, shirtless, in a tangle of sheets, a woman sitting Indian-style, dealing herself a hand of cards. There's an ersatz table, just a piece of plywood laid across two sawhorses, strewn with drawing paper and old newspapers. The store smells like must and cigarettes and body odor. The squat man in the wool cap leans across the prone body of the sleeper to reach a Bunsen burner and light his cigarette on its blue flame.

"So, what's up?" says Nico. "What do you want?"

What I want, suddenly and fiercely, is to get my sister the hell out of this filthy squat, to extract her like one of those private detectives who pull kids from cults and reunite them with their parents. I want to tell her she has to leave this-this-this dorm, this hostel, this squalid storefront where she has decided to spend the last days of human history bedded down with this collection of lice-infested conspiracy theorists. I want her to give up whatever fantasies are driving her actions at this point and come stay where I can see her. I want to scream at her that for God's sake she is all I have left, she's the only person still living that I have a claim on, and her poor decision-making makes me depressed and furious in equal measure.

"Hen?" says Nico, dragging on her cigarette and blowing the smoke out her nose.

I don't say any of those things. I smile.

"Nico," I say. "I need your help."

If I can find the woman, I'll have the man.

Culverson's right. When you look at it objectively, my plan is a long shot at best. It's the plan of a rookie or a plum fool: going to look for a person in the one place in New England where it's probably the hardest to find anyone. A woman for whom I have no physical description, just an age and a stale address. And why? Because this woman may or may not have had a relationship two years ago with the man I'm looking for now.

And the thing is, McGully's right, too-I'm not unmindful of that. There is an aspect of my character that tends to latch on to one difficult but potentially solvable problem, rather than grapple with the vast and unsolvable problem that would be all I could see, if I were to look up, figuratively speaking, from my small blue notebooks. There are a million things I might be doing other than putting in overtime to make right one Bucket List abandonment, to heal Martha Milano's broken heart. But this is what I do. It's what makes sense to me, what has long made sense. And surely some large proportion of the world's current danger and decline is not inevitable but rather the result of people scrambling fearfully away from the things that have long made sense.

That's what I like to tell myself anyway, and it's what I'm telling myself now, as I take off for Durham, biking by night, east-southeast on Route 202 with my madman sister for a sidekick, buoyed forward on a cloud of instinct and guesswork. It's only about forty miles from Concord to Durham, an easy bike ride with no vehicular traffic going either way, just mild summer weather and the trill of night birds. Sometimes Nico rides ahead and sometimes I ride ahead, and we shout jokes to each other, small observations, checking in: "You doing okay?"

"Yeah, dude. You?"

"Yeah."

One time the headlights of a bus appear in the darkness like lanternfish, get close, zoom past. A mercy bus, running on some sort of rotgut fuel, jammed with singing clapping passengers, luggage racks strapped precariously to the top: off to do some good works somewhere in Jesus's name. We watch the taillights disappear into the westbound distance, the once-familiar sight of bus headlights on a highway at night as unfamiliar and eerie as if a tank had just rolled by.

I've haven't been to UNH, not recently. I've been before, in the old days, but not since Maia, and not since the bloodless "revolution" in January, when a group of students exiled the faculty and staff, took over the campus and rechristened it the Free Republic of New Hampshire. Supposedly the plan was to quickly forge a utopian society in which willing participants can live out the rest of time in communal harmony with their brothers and sisters, everyone contributing, everyone respecting everyone else's freedom to spend life's remaining hours doing what they saw fit.

Nico, as I had suspected, has been down there numerous times. Apparently, her little clubhouse in Concord has something of a satellite office in the Free Republic. And, most important, she claims to know exactly how to get me in. "Oh, yeah," Nico said, grinning, when I explained my dilemma, delighted to be in possession of something I need. "I know the place. I know it well. All the signs and shibboleths." And when I explained who the client was, that the man I was looking for was married to Martha Milano, that only sweetened the deal-Nico was happy to pack a bag and come help me navigate the terrain.

There was just one condition-and she said that, of course, narrowed her eyes like a gangster-movie tough guy and said, "There's just one condition ..." After the trip, when I had what I needed, I had to promise that I would sit down with her so she could explain what she and her friends are up to.

"You bet," I told her. We were sitting in Next Time Around on two filthy beanbag chairs, speaking in low whispers. "No problem."

"I'm serious, Hen."

"What?"

"You have a way of saying you're going to listen to something, but then when the other person is talking you're up in your head having some sort of complicated policeman dialog with yourself about something else."

"That's not true."

"Just promise that when we sit down, and I lay it all out for you, you will listen with an open mind."

"I promise, Nic," is what I told her, extracting myself with difficulty from the beanbag chair. Then I even looked her in the eye, to make sure she knew I was listening to her and not to any voices in my head. "I promise."

And so now we're biking along 202, through the forested counties, past Northwood Center and Northwood Ridge, talking sometimes, singing sometimes, sometimes just gliding in silence, listening to the distant thud and whack of trees being cut down for firewood. It was harder for Nico than it was for me, everything that happened, the series of catastrophic events that marked our childhood. I was twelve and she was six when our mother was murdered in a Market Basket parking lot, and our father hung himself with a window cord, and we were sent to live with our stern and disinterested grandfather.

It would be difficult for me to disentangle these three sequential and overlapping traumas, tease them apart and judge which affected me the most. I can say with confidence, however, that as painful as all of it was for me, it swept over my sister like an advancing wall of water-pulled her under and never let her up. At six she was a small flickering gem of a child: agile minded, anxious, curious, quick witted, chameleonic. And here comes this great thundering wave and it knocked her over and dragged her around, filled her with pain like water in the lungs of a drowning man.

Somewhere east of Epsom, Nico begins to sing, something I immediately recognize as a Dylan song, except I can't place it, which is odd to consider, that she might know one I don't. But then Nico gets to the chorus, and I realize it's "One Headlight," the number by Dylan's son.

"Love that song," I say. "Are you singing that because of Martha?"

"What?"

I veer in close, pedal up alongside Nico. "You don't remember? That spring, she listened to that song nonstop."

"She did? Was she even around?"

"Are you kidding? All the time. She made dinner every night."

Nico looks over, shrugs. Invariably we refer to that grim doom-heavy period of our mutual memory as that spring, rather than by the more cumbersome formulation that would be more accurate: "the five months after Mom's terrible death but before Dad's."

"Do you seriously not remember that?"

"Why do you care?"

"I don't."

She gives herself a burst of speed, takes the lead again, and goes back to singing. "Me and Cinderella, we put it all together ..." Houdini is in the wagon hitched to the bike, among the supplies, panting, joyful, his weird little pink tongue tasting the wind.

It's past midnight when we get to India Garden, the terrible restaurant just off campus that was, for some reason, Nathanael Palace's dining selection when I was a high school junior and we came to tour the campus. Dim multicolored lighting, indifferent employees; abundant portions of barely edible food, strangely textured and overly spiced. I had zero interest in attending the University of New Hampshire anyway. You only needed sixty credit hours for the Concord PD, so that's what I did: sixty hours exactly at the New Hampshire Technological Institute and then off to the Police Academy. I figured Grandfather would be proud eventually, once I was on the force, but by the time I graduated he was dead.

Nico and I kickstand our bikes and wander through the abandoned restaurant like visitors from a foreign planet. The sign's been torn down and the windows and door smashed with a blunt object, but the inside is untouched, preserved as if for a museum display. Long rows of chafing dishes under long-cold heating lamps, rectangular tables tottering unevenly. The smell, too, is the same: turmeric and cumin and the faint resonance of mop water from the linoleum floor. The cash register, miraculously, has money in it, four limp twenty-dollar bills. I feel them between my thumb and forefinger. Worthless bits of paper; ancient history.

Houdini has fallen asleep in the wagon, nestled amongst my jugs of water and peanut butter sandwiches and Clif Bars and first aid supplies, eyes fluttering, breathing softly, like a child. I lift him out and place him gently in a bed of empty rice sacks. Nico and I roll out sleeping bags and arrange ourselves on the floor.

"Hey, what's she paying you for this gig?" she asks.

"What?" I say, pulling the little Ruger from my pants pocket and placing it beside my bedroll.

"Martha Milano. What's she paying you to find her deadbeat husband?"

"Oh, I don't know. Nothing really. I just ..." I shrug, feeling myself get flush. "He promised her he would stay till the end. She's upset."

"You're a moron," says Nico, and it's dark but I can hear in her voice that she's smiling.

"I know. Goodnight, Nic."

"Goodnight, Hen."

The flag of the state of New Hampshire has been removed from above Thompson Hall, and a new flag has been raised in its place. It depicts a stylized asteroid, steel gray and gleaming as it streaks through the sky, with a long sparkling contrail flashing out behind it like a superhero's cape. This asteroid is about to smash not into the earth, however, but into a clenched fist. The flag is enormous, painted on a bed sheet, rippling buoyantly on the summer wind.

"You shouldn't be wearing a suit," Nico tells me for the third time this morning.

"It's what I brought," I say. "I'm fine."

We're making our way up the long hill, overgrown with crab-grass and onion grass, toward the imposing castlelike facade of Thompson Hall. Houdini trots along behind us.

"We're going to a utopian society, run by hyperintellectual teenagers. It's July. You should have put on some shorts."

"I'm fine," I say again.

Nico gets a pace or two ahead of me and raises a hand in greeting to the two young women-girls, really-coming forward off the steps of Thompson to meet us. One is a light-skinned African American girl with short tightly braided hair, green capri pants, and a UNH T-shirt. The other is pale skinned, petite, in a sundress and a ponytail. As we get closer, past the flagpole, they both raise shotguns and point them at us.

I freeze.

"Hey," says Nico, nice and easy. "Not with a bang."

"But with a whimper," says the white girl in the sundress, and the guns come down. Nico hits me with the smallest, sliest of winks-all the signs and shibboleths-and I exhale. This entire moment of peril has escaped the notice of my vigilant protector: Houdini is sniffing at the ground, digging up tufts of wild grass with his teeth.

"Oh, hey, I know you," says the short white girl, and Nico grins.

"Yes, indeed. It's Beau, right?"

"Yeah," says Beau. "And you're Nico. Jordan's friend. You were here when we put up the greenhouse."

"I was. How's that going?"

"So-so. We got great dope, but the tomato vines will not take."

The black girl and I look at each other during this exchange and smile awkwardly, like strangers at a cocktail party. We're not alone, I've noticed: Hanging out on the stone wall that extends from the right side of the building are two kids, all in black, each with a bandana pulled up over the lower half of his face. They're stretched out on the wall, relaxed but watchful, like panthers.

"You're working perimeter now?" says Nico to Beau.

"I am," she says. "Hey, this is my girlfriend, Sport."

"Hi," says the African American girl, and Nico smiles warmly. "This is Hank."

We all shake hands, and then Beau says, "Listen, sorry," and steps forward, and Nico goes "Totally okay," and they frisk us, one at a time, quick perfunctory pat-downs. They open the heavy duffel bag that Nico took with her from India Garden, unzip it, peek inside, then zip it back up. I'm empty-handed, just a couple of blue notebooks in the inside pocket of my suit coat; the handgun, Nico strongly suggested I leave back at the restaurant.

"Why are you dressed like that?" Sport asks.

"Oh," I say, looking down and then up. "I don't know."

I can feel Nico's irritation rolling off her. "He's in mourning," says my sister. "For the world."

"All right, you guys are clean," says Beau brightly. "As you know."

"Oh my God," says Sport, bending to pet the dog. "So cute. What kind of dog is she?"

"He," I say. "He's a bichon frise."

"So cute," she says again, and it's like we're in one of those alternate dimensions, just some folks hanging out on the front steps of campus: green lawn, blue sky, white dog, a group of friends. Detective McGully has remarked on the gorgeous run of summer weather this year. He calls it nut-kicker weather, as in, "that's just God, kicking us in the nuts."

Good old McGully, I think in passing. Off and running.

The boys on the wall are not introduced, but their aesthetic and affect are familiar; the kinds of young men one used to see on the evening news, rushing through city streets in clouds of tear gas, protesting the meetings of international financial organizations. These two seem confident and calm, long legs dangling over the stone walls of the university, passing a cigarette or joint back and forth, strips of ammunition pulled across their chests like seatbelts.

"So, hey," says Nico. "Hank is coming in with me, just for the day. He's looking for someone."

"Oh," says Sport. "Actually-" She stops, tenses up, and looks to Beau, who shakes her head.

"You've been here before, so you're good," says Beau to Nico. "But unfortunately your friend has to be quarantined."

"Quarantined?" says Nico.

Quarantined. Terrific.

"It's a new system," Beau explains. She's a small woman with a small voice, but she's clearly not timid. It's more like she's insisting that the listener pay attention. "The idea came from Comfort, but there was a whole Big Group vote on it. In quarantine, newcomers are instructed in the function of our community. Divested of their old ideas about living in the self, and at the same time divested of their personal possessions." She's fallen into a rhythm, here, she's reciting a set speech. "In quarantine a newcomer learns the way thing are handled at the Republic, and to prioritize the needs of the community over their needs as an individual."

"There've been a lot of people just, like, wandering in," Sport adds more casually, and Beau scowls. She liked her official explanation better.

"What people?" says Nico. "CIs?"

"Yeah," says Sport, "But also just-you know. Whoever."