The hallway swallowed them whole.

Unlike the rooms they’d explored before, the reconstructed bedroom, the clinical lab, this passage felt alive. The walls curved inward, the ceiling sloped low, and thin strips of red light pulsed like a heartbeat guiding them deeper. The air changed, too denser, metallic, almost electrical.

Justina brushed her fingers along the wall.

“It feels like we’re walking through the ribcage of something.”

Carson nodded once.

“That’s exactly what it ...