Documentary covering the famous 'demonic possession' case of Anneliese Michel. The film features authentic footage of 'exorcisms' and other shocking events, considered to be the inspiration of the film The Exorcism of Emily Rose.

Merle Hammond (Michael McKean), a sleazy attorney, uses corrupt tactics and convinces a jury to acquit his client who is a killer. Gwen (Annette O'Toole), the murdered victim's sister, plots revenge against the attorney. Out of desperation, she kidnaps and tortures him in an attempt to make him confess to his unscrupulous tactics. The cards twist when he escapes and puts her on trial for his kidnapping.