A man crippled from a botched operation, Kurt Ingston (the original Professor Mortis himself-Ralph Morgan!) summons his three doctors (Lionel Atwill, Frank Reicherto, and Francis Pierlot) to his mansion in the swamps after one of his other doctors is mysteriously murdered. In short order the doctors begin to die. Ingston’s supposedly insane sister Margaret (Fay Helm) brings in psychiatrist Dr. Harper (Irene Hervey) to figure out who is committing the murders. She’s helped out by the mystery novelist Dick Baldwin (Don Porter) and the local Constable (Robert Homans).Suspects include the Ingstons, Ingston’s Eastern guru Agor Singh (Nils Asther), creepy butler Rolf (Bela Lugosi), sleazebag chauffeur Laurie (Leif Erickson), the devoted housekeeper that secretly loves Ingston (Doris Lloyd), and creepy gatekeeper Torque (Cyril Delevanti). Can Dr. Harper and Baldwin stop the murderer?![]()
