Naive but devout villagers find themselves victimized by two conniving grifters in this French crime drama. The con artists are a former priest and his lover, respectively, who have come to town proclaiming themselves "Holy Father' and "Holy Mother." Soon, the awe-struck villagers are handing their land and savings over to the wicked duo. One farmer's daughter sees through the scam and accuses the townsfolk of worshiping Satan. They in turn accuse her and try to exorcise the demons from her by beating her severely. She dies, and the con artists try to frame her father for the death. Fortunately, Angelique, a beautiful nun with a gift for prophecy, saves him and the rest of the town.