A troubled young girl goes to confession at the local church. Unfortunately, the sexually frustrated priest she confesses to becomes obsessed with her. At first, the priest stalks the girl, but later it is revealed that he will stop at nothing, including blackmail and murder, just to get close to her.
House of Mortal Sin is a 1976 British horror slasher film directed and produced 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.