Plenty of legends surround the infamous Boulder House in Whispering Bluffs, Wisconsin, but nobody takes them seriously. Certainly nobody believes that the original owner, Maxwell Cartwright Jr., cursed its construction—or that a murder of crows died upon its completion, turning the land black with their carcasses. If there were truth to any of the local folklore, River Red High wouldn’t offer a field trip there for the graduating class.
Five very different seniors—Violet, Paul, Ashley, Dylan, and Gretchen—volunteer, each for private reasons, none of which have to do with trip itself. When they’re separated from the group, they discover that what lies within Boulder House is far more horrifying than any rumor they’ve heard. To survive, they’ll have to band together and ultimately confront the truths of their darkest selves.