Vincent Price plays a 16th century Spanish nobleman, Nicholas Medina, who starts to go mad when he begins to believe that his wife has been buried alive. It’s actually a joint plot between the “dead” wife and her doctor/lover to get ahold of Medina’s money. Medina goes completely insane and assumes the identity of his father, who was a rabidly brutal grand inquisitor. Caught up in his new persona, Medina starts to murder his victims. Loosely based on a story by Edgar Allen Poe.