House of Mortal Sin (also known as The Confessional and The Confessional Murders) is a low budget 1976 British horror film directed by Pete Walker. It was scripted by David McGillivray from a story by Walker. Its plot concerns a deranged priest who takes it upon himself to punish his parishioners for their moral transgressions.
The poster tag line read: "tortured by desires his vows forbid... master of a house of mortal sin!"