Several years after the horrific events at Camp Arawak, the now reformed Angela Johnson works as a counselor at a new summer camp for teens, called Camp Rolling Hills. The camp is peaceful at first, with campers engaging in typical summer activities under the watchful eye of the strict yet seemingly friendly Angela. However, Angela harbors a dark secret and a firm sense of moral superiority, leading her to take drastic measures against campers who break her strict codes of conduct. Her methods quickly escalate from stern reprimands to something far more disturbing.

As her behavior becomes increasingly alarming, a series of mysterious disappearances and gruesome discoveries unsettle the camp. The other counselors and campers begin to suspect that something is terribly wrong, but their attempts to get to the bottom of it are thwarted by Angela's cunning and ruthlessness. Tension mounts as the threat looms larger, eventually exploding into chaos. Friends are pitted against each other in a desperate fight for survival, with the true extent of Angela's madness revealed too late.