A brilliant but deranged neurosurgeon becomes obsessively fixated on a judge's daughter. With the help of an escaped criminal whose face he has surgically deformed, the mad man lures her, her father, and her fiancé to his isolated, castle-like home.

Boris Karloffas Edmond Bateman
Bela Lugosias Dr. Richard Vollin
Lester Matthewsas Dr. Jerry Holden
Irene Wareas Jean Thatcher
Samuel S. Hindsas Judge Thatcher
Spencer Chartersas Col. Bertram Grant
Inez Courtneyas Mary Burns
Ian Wolfeas Geoffrey 'Pinky' Burns
Maidel Turneras Mrs. Grant