“So if you can’t break the security servers — ”

“Don’t have to. Camera got memory, memory got cache. Since the lockdown, it’s just filling and filling. No one watching.”

“You’re kidding,” Prax said. “The two biggest armies in the system are staring each other down, and they’re not watching the security cameras?”

“Watching each other. No one half-humps for us.”

The progress bar filled completely and chimed. The boy pulled open a list of identifying codes and started paging through them, muttering to himself. From the front room, a baby complained weakly. It sounded hungry. Of course it did.

“Your kid?”

The boy shook his head.

“Collateral,” he said, and tapped twice on a code. A new window opened. A wide hall. A door half melted and forced open. Scorch marks on the walls and, worse, a puddle of water. There shouldn’t be free water. The environmental controls were getting further and further away from their safe levels. The boy looked up at Prax. “C’est la?”

“Yes,” Prax said. “That’s it.”

The boy nodded and hunched back over his console.

“I need it before the attack. Before the mirror came down,” Prax said.

“Hokay, boss. Waybacking. Tod a frames con null delta. Only see when something happens, que si?”

“Fine. That’s fine.”

Prax moved forward, leaning to look over the boy’s shoulder. The image jittered without anything on the screen changing except the puddle, slowly getting smaller. They were going backward through time, through the days and weeks. Toward the moment when it had all fallen apart.

Medics appeared in the screen, appearing to walk backward in the inverted world as they brought a dead body to lay beside the door. Then another draped over it. The two corpses lay motionless; then one moved, pawing gently at the wall, then more strongly until, in an eyeblink, he staggered to his feet and was gone.