Adolfo Berto, the owner of an Italian restaurant has been killed by a racket organization: a woman used a weapon with silencer to kill him in the basement of the restaurant and went away. The bullet used if Russian origin. So the commissioner is thinking in Alexander Turobin as boss of the racket organization. Then Trautzschke goes to visit his old acquaintance Matthias Petzhold in the prison, because Matthias knew Turobin when he was working on a pipeline in Siberia. So he will propose Matthias a deal: his collaboration to catch Turobin and the time of prison of Matthias will be reduced. The colleagues of Trautzschke are not very convinced about the deal.
—zutterjp48