Jetzt schlägt's 13.

A powerful storm is brewing at Villa Sonnenschein. Mr. and Mrs. Jaconis have declared total marital war on each other. Jealous Hedy insists on the dismissal of her longtime servant Max, who is too adept at covering up her husband's amorous past, the successful author Dr. Jaconis. Max leaves, and the newly hired servant Ferdinand arrives. When the two meet one night, a fateful mix-up of suitcases occurs. Max suspects that his successor must be a criminal and feels obligated to protect his former employer from harm. He secretly returns to the villa. When Hedy's friend Lilly and the publisher Dr. Ravestyn also arrive, the house becomes a battle arena. Everyone suspects everyone else, and adultery and breach of trust, murder, and manslaughter are just some of the accusations that are leveled...