How much shock can the human brain endure before it cracks?
Count Karnstein sends for a doctor to help his sick daughter Laura. Her nurse believes she is possessed by the spirit of a dead ancestor, Carmilla. A young woman becomes intrigued by the mysterious deaths surrounding Laura after a carriage accident outside the castle forces her to stay. They become close friends until Laura becomes convinced the spirit of Carmilla is forcing her to kill.
Director: Camillo Mastrocinque
Screenplay: Ernesto Gastaldi, Tonino Valerii
Producer: Mario Mariani
Director of Photography: Julio Ortas
Story: Ernesto Gastaldi
Count Ludwig Karnstein
Laura Karnstein
Ljuba
Friedrich Klauss
Annette
Ljuba's Mother (as Cicely Clayton)
Cedric
Franz Karnstein (uncredited)