Two reporters and a cop trying to track down a killer known as "The Thirteenth Apostle," each receive an invitation from "The Avenger!"

When an architect murders his wealthy aunt for her money, he's forced to kill again after a small-town pharmacist uses a doctored photograph to blackmail him, but his attempts to cover up the crimes only lead to more deadly complications.

A real estate agent rents a country house to newlyweds. A caretaker warns them to leave due to ghostly happenings. A spectral figure reveals past crimes, leading to a chilling discovery that finally brings peace.