Early in the morning, while walking around the Stuttgart market hall, a security guard found one of the dealers lying dead in his stand; His 19-year-old, mentally handicapped son Geza is kneeling next to him with the murder weapon in his hand. Bienzle has to deal with the network of market people and finds out that the victim not only "moved" fruit and vegetables, but also stolen jewels. At the same time, Bienzle takes care of the boy, who is now an orphan - his mother left him long before - and takes him home. Then Geza comes into conflict with Hannelore, who is by no means upset by the visit.