Released from a psychiatric hospital after becoming convinced that he is possessed by a demonic entity, Derek is still reeling from the mysterious deaths of his classmates five years prior. Placed into the care of his friendly cousin, April, Derek is terrified that the demons within him will return despite reassurance from doctors that it's all a figment of his imagination. When increasingly violent incidents and disturbing encounters begin to take place, April suspects that there is more to the situation than simply mental illness, and turns to demonologist Lucas for help. - A man is convinced that he is possessed by a demonic entity.