To the Devil a Daughter (1976)

Storyline:

To the Devil a Daughter (1976) An excommunicated priest sets up a satanic cult that only looks Catholic on the outside. He convinces a man to sign over his daughter's soul so that she will become the devil's representative on earth on her eighteenth birthday, but as that day nears, the man seeks the help of an American occult novelist to save his daughter, both physically and spiritually.