Jayden raised his hand, preparing to give the signal, and Haru hovered his finger over the detonator. Kira stopped him, trying desperately to mime the phrase, There’s one more in the hallway. She could hear its footsteps. Haru seemed to understand and nodded.

Jayden gave the signal and curled up behind the mattresses they’d piled against the wall. When nothing exploded, he turned in alarm; when he saw Haru waiting, he mouthed obscenities and gave the signal again.

Kira pointed at the hallway, miming as best she could, There’s one more. She held up three fingers, stabbing the air emphatically. Jayden slowly, silently moved back to his looking device, then leaped up in surprise the instant he looked through it, lunging for Haru with wide, terrified eyes. The doorknob turned—one of the Partials was coming in—and Kira slammed her hand down on the detonator button.

The world roared.

The explosion shook the building, knocking frames from the walls and plaster from the ceiling. The wall shattered and flew toward them, and even with the mattresses it felt like being hit in the head with a hammer. In the same instant the entire room started sliding downward, the floor giving way with a sickening sense of vertigo. Kira clung to the empty bed frame, though it was sliding along with everything else. She heard another massive roar, saw an avalanche of wood and plaster thundering toward her, and let go of the bed to cover her head with both hands.

She felt herself buffeted from all directions, then enveloped by something rough and massive. The movement slowed, stopped, and as she slowly uncovered her head she saw other parts of the building still shifting—a shower of dirt and rubble, a falling refrigerator, a rug slipping slowly into a hole. The building’s rooms and floors had become meaningless, smashed together in a three-dimensional chaos. Kira tried to move; she was buried to her waist in rubble. Her legs felt pinned by something huge and heavy.

She heard a cry from somewhere in the distance and shouted back, her throat dusty and her voice raw.

“Hello! Jayden!”

A hand rose up from the rubble in front of her, clad in the dark gray uniform and body armor she recognized from countless war-era photographs. It was a Partial.

Kira strained at her legs, unable to move, then looked for her rifle. It was nowhere—even her medkit was gone. The arm in the rubble moved slowly, tenaciously, searching by touch for something to hold. It found a jutting piece of rebar and gripped it tightly, straining at its own weight, and Kira saw the rubble begin to shift. The Partial was rising to the surface—

—and then a rat fell from the sky.