The IT specialist Hartmut Wörner is beaten to death in the red light district. A dispute with the sex worker Iris is suspected. Then Nikolaus Müller takes over the case. The situation is sensitive for Jan because Juli Segers is involved.
Lydia Wertheim sees the dead body of a young woman in the park and runs away in panic. When the police arrive, the dead woman has disappeared without a trace. Lydia's husband Hendrik suggests that his wife is suffering from delusions.
Harry Knopp, President of the football club FSV 1963 Berkenbach, is found dead in the sauna. Knopp had put a lot of money into the club, but appeared very unsocial. The talented goalkeeper Maximilian in particular was blackmailed by Harry.
Beaming with joy, Ella's mother Heidi celebrates her birthday as the "fairy queen" until she suddenly dies during the celebration. An autopsy later revealed that she was poisoned. Ella's sister Mona, who is heavily in debt, is suspicious.
During an operation with the SEK, a girls' trafficking ring is to be exposed and Natalka Kaminski's body is found. Only one of the girls, Anna, is rescued. Leni Trautzschke, who was in contact with Natalka, takes in Natalka's sister Anna.
Sexual companion Eva Siebert exchanged caresses with people with disabilities. Was a customer her downfall? Two potential perpetrators were arrested at the crime scene. Leon Spieß, who lives with trisomy 21, could help clarify the case.