A count who experiments with electro-stimulation of human blood discovers that his wife is having an affair. Catching the two lovers together, the count tortures and kills them, using their hearts and blood to further his experiments and to restore the beauty of his own lover. After his wife's death, the count discovers that her castle and fortune are to be given to her sister instead of him. Hoping to continue his lifestyle and his experiments, the count manipulates the sister and marries her, hoping to eliminate her as he did his first wife, not knowing that the spirits of his wife and her lover are out for revenge.