At a hidden summer camp deep inside a Missouri cave, four teens arrived carrying secrets they barely understand.

Jeffery has spent his life hiding what he is. Nanette can become whoever the room needs her to be, but she’s never been told the truth about herself. Tiffany notices everything, including the numbers that no longer add up. Lovlie speaks to the dead, until something in the cave makes even the dead afraid.

When campers begin to vanish, and adults in charge offer easy answers that don’t fit, their separate mysteries collide. To uncover what’s really happening beneath the rock, the four of them will have to trust each other before they become the next ones to disappear.