A newlywed bride moves into her husband's ancestral German castle and discovers that someone has secretly reactivated the torture devices from its museum of medieval instruments, using them to murder people connected to the castle's dark wartime past. She has to figure out who's behind the killings before she becomes the next victim. Italian gothic horror directed by Antonio Margheriti (credited as "Anthony Dawson"), co-starring Christopher Lee, based on the novel by Frank Bogart.