The Last Exorcism

Filmmakers Iris and Daniel follow Cotton Marcus, a reverend living in Baton Rouge, Louisiana, who seeks to delegitimize exorcisms. Marcus, who lost his faith after the birth of his ill son, is accustomed to performing fake exorcisms on "possessed" individuals. He accepts an exorcism request sent by farmer Louis Sweetzer, who claims his livestock are being slaughtered by his daughter Nell; Louis suspects that Nell is possessed by Satan.

Marcus arrives and claims Nell is possessed by Abalam, a powerful demon. He persuades the family that he has driven out the demon and leaves, believing he and his crew have cured her of a mental state that was misdiagnosed as possession. That night, Nell appears in Marcus' motel room, visibly unwell. Marcus takes Nell to the hospital for tests, which conclude that she is in perfect physical condition. Marcus goes to see Louis' former pastor, Joseph Manley, who informs Marcus that he has not seen Nell for three years. In the morning, Louis takes Nell home but chains her to the bed after she cuts her brother Caleb's face with a knife.