I.

Jack Malone woke up in a ruined basement and looked through a crack in the concrete and saw the dust ring.

It was a faint, sickly glow on the horizon, a ring of nuclear dust and atmospheric debris that encircled the Earth after the nuclear exchange ten years ago. It blocked sunlight. It caused constant acid rain. It slowly poisoned everything alive. But it was there, visible from anywhere on Earth, a constant reminder that the world had ended and nobody had bothered to tell him.

He had been collecting scrap for years. Metal, plastic, anything usable. He sold it at the settlement for canned food and filtered water and occasionally, if he was lucky, a cigarette. He lived in the basement with Tommy, a thirty-year-old overweight man who used to be a mechanic and now maintained a collection of old nuclear batteries scavenged from pre-collapse facilities.

"Why do you keep those?" Jack asked him one day, watching Tommy carefully charge a battery using a hand-cranked generator.

"So we can use them," Tommy said.

"For what?"

Tommy didn't answer. He just kept cranking.

II.

The Girl from Eridani appeared at the settlement three years ago, walking out of the dust like a ghost. She was nineteen, thin, and carried a crystal pendant that glowed faintly when the dust ring was thinnest. She spoke little. When she did speak, it was in riddles that made no sense until they did, and then made too much sense.

"She's crazy," the settlement leader said. "But she helps with the gardens. So she stays."

Jack didn't mind her. She sat by the window in the basement and watched the dust ring, and sometimes she would look at Jack with eyes that were too old for her face and say things like "You will see it too, Jack. Soon."

He would tell her to eat something. She would nod and eat. Then she would go back to watching the ring.

Mr. Jaw arrived on a Tuesday, in a modified pre-collapse truck that sounded like a dying animal. He was six foot five, with unusually dark, textured skin and a voice like gravel in a tin can. He claimed to represent a group called "The Ring Walkers," who believed the dust ring was not a weapon but a natural phenomenon that would eventually clear.

"Project Artemis," he told Jack and Tommy and the Girl from Eridani, sitting on a crate in the basement and speaking in his low, gravelly voice. "The government has a plan. They're going to use nuclear batteries to push the Moon into the dust ring, tearing it apart. It won't work. But they're going to try. And you're going to help them."

Jack asked him how he knew all this.

Jaw looked at him with eyes that were too calm, too rational, too certain. "Because I've been watching you for a long time, Jack Malone. You're the kind of man who does what has to be done, even when he doesn't want to. Even when he knows it won't matter."

III.

Tommy moved the batteries to the surface that night. Jack found him there, loading them into a modified pre-collapse launch tube that Tommy had been building in secret for months. It was crude, inefficient, and probably wouldn't work, but Tommy was determined.

"I'm doing this, Jack," Tommy said. "I don't know if it'll work. I don't know if anything will work. But I'm doing it."

Jack tried to stop him. He really did. But Tommy was stronger than he looked, and he was faster, and he had something Jack didn't have—a reason to believe that trying mattered, even when the outcome was certain.

The launch happened at dawn. Jack watched from the basement window as the launch tube fired, sending a single nuclear projectile arcing into the sky, toward the dust ring. The projectile hit. The ring tore slightly. Dust continued to fall.

Tommy died in the launch. His body was found among the batteries, charred and unrecognizable, but Jack knew it was him because of the scar on his left hand, from a machine accident back when Tommy was still a mechanic.

Jack buried him in the garden, next to the blade of green grass that had somehow survived the dust and the acid rain and the end of the world.

IV.

The ring did not clear. The dust continued to fall. The settlement survived, barely, for another year, and then the water filtration system failed and they scattered, some dying, some surviving, some disappearing into the dust.

Jack returned to the basement, where the Girl from Eridani was waiting. She gave him the crystal pendant. "It will show you the truth," she said.

Jack looked out through the crack in the concrete. The ring was still there. But for the first time in years, he saw a blade of green grass growing through the dust.

He didn't know if it meant anything. He didn't know if anything meant anything. But the grass was alive, and it was green, and it was growing, and for now, that was enough.

V.

Two hundred years later, an archaeologist excavated the ruined basement and found a letter folded in a metal box. The letter read:

"To my family, if you're still there. I was just a man. I didn't ask for this. But I did what I had to do."

The archaeologist put the letter in a bag and labeled it "Artifact 47-Beta, Midwest Ruins, Pre-Collapse Era." Then she went back to work, digging through the rubble of a civilization that had tried to save itself and failed, and wondering, not for the first time, whether trying was enough.

It wasn't. But it was all they had.