A brush with death rattles the girls. The boys must defend themselves against a blood-thirsty predator. In a series of flashbacks about Scotty and Bo, we learn how the world has tried to grind them down, and why it’s hard for them to trust the other castaways.

The girls relocate to the hot springs, but the perilous journey shatters the group and Leah is driven further into madness. The boys manage to come to a truce, but it’s upended when troubling secrets about their most controversial member come to light.