Ambrosio is a monk who is sexually tempted by an emissary of the Devil, a young girl in monk's robes. After he has committed numerous crimes, it appears that he will be caught and punished by the Inquisition. Instead, he signs up on the Devil's team and wins his freedom.. and eventually, the papacy.

• Tritone Cinematografica
• Maya Films
• Franco Nero
• Nathalie Delon
• Nicol Williamson
• Nadja Tiller
• Eliana De Santis
• Agnès Capri
• Denis Manuel
• Maria Machado