Carmilla (Annette Vadim), jealous of her friend's engagement, seeks an answer to her troubles in the tomb of a female vampire. Possessed by this evil spirit, Carmilla is compelled to kill the inhabitants of a remote country estate. French favorite Roger Vadim directs his real-life wife in this tale of passion and terror, which also features Mel Ferrer as Leopoldo De Karnstein and Elsa Martinelli as Georgia Monteverdi.