Crypt of the Vampire(La cripta e l'incubo)

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.