Victor Frankenstein (Ralph Bates) is the son of the Count who plans his father's demise. He inherits the castle and the comely housekeeper (Kate O'Mara) who doubles as his mistress. Soon Victor is busy murdering people to build his monster (David Prowse). His victims include his neighbor, his housekeeper, a gravedigger, a professor and his best friend. He patches the various body parts together to make his horrible creation in this horror story with a good dose of comedy.