Thanner moved in with Schimanski because his girlfriend Sylvia kicked him out due to his constant jealousy. He brings order to Schimanski's somewhat chaotic household, but his own soul is in considerable turmoil. He refuses to accept the breakup with Sylvia and tries to undo what happened. Everything else—including his job—is currently of secondary or tertiary importance to him; let Schimanski handle it. And Schimanski does. He investigates the murder of Daddel Virks, a small-time sleuth and assistant to private detective Scholl, who was once a colleague of Thanner and Schimanski.