ost of the film takes place in an old mansion where the characters participate in a séance while a storm rages outside. During their stay, the film uses an extensive flashback structure to reveal the various criminal acts that each have perpetrated. The man leading the seance (Luciano Pigozzi, the "Italian Peter Lorre") seems intent on holding them responsible for their various crimes, and his seemingly supernatural knowledge of their past gradually cracks the facade of each one. A classic Italian Gothic from Antonio Margheriti. German/Italian co-production, 'old dark house' style.

Overview from themoviedb.org