Since the death of her mother 18 years ago Pia Gonnermann, now 24, has been living alone in a feudal villa as a rich hieress. 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 he bath-tub covered in blood.
Erik Tennstedt, a detective, has been isntructed by her bank to clear up the strange situation by delving into the past. What sort of position does Christoph Vranek, alias Hahne, have in the whole affair?