After surviving a car crash that killed her boyfriend (Casey Affleck), Cassandra (Melissa Sagemiller) finds herself haunted by his ghost. A priest (Luke Wilson) tries to exorcize these frightful visions from Cassandra’s mind, but her college friends see her vulnerability as the perfect outlet for their malicious plans. She tries to carry on her life like all the other college freshmen, but it unravels when she begins to believe she is being stalked. Then Cassandra has horrifying hallucinations; during a midterm, she bleeds profusely all over her desk, and the drain in her shower explodes with blood. Gradually, Cassandra understands what is happening to her, but will she be able to survive.