A body lies on a boat, a suspect runs away with the murder weapon in his hands, and there are indications of a robbery at the crime scene: Klara Blum's new case seems to have been solved from the start. Without hesitation, the public prosecutor signs the arrest warrant. With a confession from the suspect, the case would be complete. But Daniel Seefried denies the murder of the rich industrialist Wolfgang Reichert. He appears dazed and believes he has been drugged. He himself does not know how he got on the ship and the knife in his hand. Hard to believe and even harder to prove. Klara is suspicious of Seefried. But she's also confused. The number of Rita Fürmann, the public prosecutor's wife , is found in Seefried's phone memory .
Fürmann arranges a local appointment on the ship, during which Seefried manages to escape. Intent or carelessness of the prosecutor? In any case, Seefried has disappeared. When Klara found out that Fürmann had his wife observed and knew about her affair with Seefried, she began to doubt his integrity. Is the prosecutor really objective about the suspect? Rita Fürmann is convinced that her husband knows nothing about the affair and asks Klara not to tell him anything about it. She fears for her husband's emotional balance. Fürmann's decisions and his passivity during interrogations suddenly appear in a completely different light.