After some distributors found Lisa and the devil too mystifying for release, producer Alfredo Leone (with Bava's uncredited assistance) hired veteran actor Robert Alda, shot additional scenes, and transformed Lisa into The house of exorcism, capitalizing on the popularity of demon possession films. While sharing much of the same material, the films have come to be looked upon as two distinct entities, beautifully illuminating the stylistic diversity...

Since the death of his pregnant wife in a Haitian earthquake 12 years ago, Victor Fielding has raised their daughter, Angela on his own. But when Angela and her friend Katherine, disappear in the woods, only to return three days later with no memory of what happened to them, it unleashes a chain of events that will force Victor to confront the nadir of evil and, in his terror and desperation, seek out the only person alive who has witnessed anything...