Ever since that night, twin sisters Cassie and Lenora have been inseparable. As the sole permanent residents of Cabin Two, their refuge on an isolated Tennessee campground, they manage to stay away from prying eyes, probing questions and true crime junkies. The peace and quiet is almost enough to make them forget what happened all those years ago. Almost. Until a teenage girl camping at the neighboring cabin goes missing, and the memories come rushing back. As the crime becomes ever more recognizable, each sister suspects the other knows more than she's letting on. Trapped in the isolating, claustrophobic wilderness, Cassie and Lenora must piece together the truth of what happened --- and the sinister truth lurking in their own pasts --- before it's too late.