Cassie is a 16-year old girl who transfers to a new high school where she joins the cheerleading squad. She gets dragged into partying with them which includes sex, drugs, and rock and roll. Strange things start happening and Cassie feels haunted and paranoid. She thinks a ritual the cheerleaders performed freed a ghost. More people are killed as Cassie's paranoia and state of mind worsen. It is eventually revealed that Cassie has undiagnosed schizophrenia and that the drugs she was taking caused her to kill the people in a paranoid state.