A woman who is struggling with the conflict between her faith and her personal life must defend herself against the spirit of a demonic nun who is bent on destroying her.

A chilling story of terror, murder and unknown evil that shocked even experienced real-life paranormal investigators Ed and Lorraine Warren. One of the most sensational cases from their files, it starts with a fight for the soul of a young boy, then takes them beyond anything they’d ever seen before, to mark the first time in U.S. history that a murder suspect would claim demonic possession as a defense.