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.
Christopher Lee
Count Ludwig Karnstein
Adriana Ambesi
Laura Karnstein
Ursula Davis
Ljuba
José Campos
Friedrich Klauss
Véra Valmont
Annette
Carla Calò
Ljuba's Mother (as Cicely Clayton)
José Villasante
Cedric
John Karlsen
Franz Karnstein (uncredited)
