Tara Schöll and Henry Kloss reopen the harrowing case of Helena Husek. The young woman was tied to the bed in a bungalow by the lake and found dead. All the evidence pointed to her lover Christian Bohn and made him the main suspect. His wife Bärbel gave him a waterproof alibi for the time of the crime. At that time, Rapp surprisingly stood before the court.