Klara Blum and Kai Perlmann have been a well-established team for years. They work well together and also get along privately. It is all the more dreadful when Klara finds out that Perlmann unexpectedly gets caught in the crosshairs of the investigations involved in the murder of a young woman. Because he had met Constanza on the evening of her death. During her research, Klara realizes that Perlmann is not telling her the truth about his relationship with Constanza. He also accuses her of only concentrating on him as a possible perpetrator. Klara finds little understanding for her behavior from her colleagues either. But that doesn't deter her. Step by step, she follows all the clues in order to arrest the murderer.