Reagan, a 14-year-old girl, is grounded by her parents after they find her sending suggestive selfies to boys at school. Her loneliness and resentment draws the attention of a 22-year-old medical assistant who becomes an outlet for her rebellious desires. However, what started as a seemingly innocent friendship with an older man is soon revealed to be something dangerous; as Reagan begins to learn that her first encounter with this man wasn't by chance, and that he has a terrifying plan for their future.

A supernatural thriller, the film revolves around Lucy, who has a new husband, a new home and a new baby, but old ghosts won't let her be. She has dedicated her life to helping families break the cycle of abuse, so when she and her husband, Wade, see the echoes of a violent family tragedy in their home, Lucy tries to help the tortured souls break free of their torment and move on. She finds, however, that these ghosts don't want her help - they want to lead Lucy and her family to their doom.

After a horrible boating accident kills her family, Angela, a shy and sullen young girl, moves in with her eccentric aunt Martha, alongside her protective cousin Ricky. One summer, Martha sends the kids to Camp Arawak. Soon after their arrival, a series of bizarre and increasingly violent accidents begins to claim the lives of various campers. Who is the twisted individual behind these murders? The disclosure of the murderer's identity is the most shocking climax in the history of American cinema.