Panic in the old Kiel Water Tower. During a theater performance, a young woman is brutally attacked. The alleged perpetrator, an actor from the Hamburg ensemble, escapes to the roof of the building. In the spotlight of the special unit that has arrived, he gives one last display of his skills before plunging to his death. Commissioner Hansen from the Kiel Criminal Police begins the investigation, but his hands are tied in Hamburg, so he once again asks his old friend Stuhr for help. The agile early retiree soon realizes that the solution to the case lies in the heart of the North Frisian Wadden Sea.