A banker and his old housekeeper are brutally assassinated by a gangster called Smith. The murders are arranged so that they may look like a showdown between two victims. The police force are divided on the murders. Susanna Braun, an old acquaintance of the banker, claims that he could not have murdered his housekeeper. A baron who owns a night club is in need of money. He does business with gangsters. The baron involves Smith in the kidnapping of Susanna Braun.