- Director: Camillo Mastrocinque
- Writer: Tonino Valerii; Ernesto Gastaldi
- Producer: Samuel Z. Arkoff; Mario Mariani
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.