Bang! The sound was as loud as a gunshot. Kira jerked with surprise, and then her foot slipped, and she felt the stone shift underneath her as the whole ledge gave way.

She was falling—

An image flashed through her mind of her body lying broken on the ground.

Kira yelped and flailed, trying to grab the column in front of her, but she missed and—

Darkness swallowed her. Thunder filled her ears and lightning shot across her vision as her head bounced against the rocks. Pain shot through her arms and legs as she was pummeled from every direction.

The ordeal seemed to last for minutes.

Then she felt a sudden sense of weightlessness—

—and a second later, she slammed into a hard, jagged mound.

4.

Kira lay where she was, stunned.

The impact had knocked the breath out of her. She tried to fill her lungs, but her muscles wouldn’t respond. For a moment she felt as if she were choking, and then her diaphragm relaxed and air rushed in.

She gasped, desperate for oxygen.

After the first few breaths, she forced herself to stop panting. No point in hyperventilating. It would only make it harder to function.

In front of her, all she saw was rock and shadow.

She checked her overlays: skinsuit still intact, no breaches detected. Elevated pulse and blood pressure, O₂ levels high normal, cortisol through the roof (as expected). To her relief, she didn’t see any broken bones, although her right elbow felt as if it had been smashed by a hammer, and she knew she was going to be sore and bruised for days.

She wiggled her fingers and toes, just to test that they worked.

With her tongue, Kira tabbed two doses of liquid Norodon. She sucked the painkiller from her feeding tube and gulped it down, ignoring its sickly sweet taste. The Norodon would take a few minutes to reach full strength, but she could already feel the pain retreating to a dull ache.

She was lying on a pile of stone rubble. The corners and edges dug into her back with unpleasant insistence. Grimacing, she rolled off the mound and onto all fours.

The ground was surprisingly flat. Flat and covered with a thick layer of dust.

It hurt, but Kira pushed herself onto her feet and stood. The movement made her light-headed. She leaned on her thighs until the feeling passed and then turned and looked at her surroundings.

A ragged shaft of light filtered down from the hole she had fallen through, providing the only source of illumination. By it she saw that she was inside a circular cave, perhaps ten meters across—

No, not a cave.

For a moment she couldn’t make sense of what she was seeing, the incongruity was so great. The ground was flat. The walls were smooth. The ceiling was curved and dome-like. And in the center of the space stood a … stalagmite? A waist-high stalagmite that widened as it rose.