Since the death of her mother 18 years ago, Pia Gonnermann, 24, has been living alone in a feudal villa as a rich heiress. At night she is tortured by nightmares; she hears mysterious noises, sees her mother's body hanging in the attic and her friend Linda in the bath-tub covered in blood. Detective Erik Tennstedt has been instructed by her bank to clear up the strange situation by delving into the past.