A dead man on the subway calls inspectors Ritter and Stark into action. It is the building contractor Horst Baumann, who had already come to the fore in the past due to a spectacular company bankruptcy. After a long stay abroad, he returned to Berlin to renovate real estate with the help of his attractive wife Alissa and his opaque partner Alsfeld. The investigations quickly bring the inspectors on the trail of the craftsman Rothe, who was ruined by the bankruptcy at the time. Had he wanted revenge on Baumann?