Maid for Pleasure (1974)

Nurse-student Rolande travels to the chateau to care for the Comte de Beaupre. A strange atmosphere pervades the chateau. Reginald, the butler, is a hypnotist. One stormy night, Rolande sees Gertrude, the housekeeper, sleepwalking and giving herself to the specter of the Comte de Saint-Germain, who has been dead for years...