After the inauguration party of Alex's new law firm, Wilsberg witnesses Alex's former classmate Maike Lehmann having a drunken accident on the way home.

Georg Wilsberg has a problem: A young Russian woman, living illegally in Germany, is found dead in a hotel room - murdered.

Alex's first case is about murder. Thomas Winter's wife has been strangled. Thomas is considered a suspect, but protests his innocence. Alex helps him escape.

This time it is Inspector Springer herself who needs Wilsberg's help. A young policewoman dies shortly before she was supposed to meet Anna. But that can't have been an accident.

Wilsberg goes to celebrate his 30th graduation anniversary, even though he hates such class reunions. Shortly afterwards, his old school friend is murdered, but his body disappears without a trace.

After a party, a woman is found seriously injured on the street. Ekki's car is parked nearby. Anna Springer arrests the hungover Ekki, but he refuses to make any statement.

Wilsberg is hired by Marie Kaiser to spy on her husband. The professor is cheating on her. When Wilsberg observes Kaiser, he is shot during lovemaking.

December 24th afternoon: Wilsberg buys a Christmas tree at the Münster Christmas market. At the same time, Ekki is bored at the Christmas party with his colleagues from the tax office.

Private detective Georg Wilsberg is commissioned by Torsten Schmitt to shadow his wife Elvira because of an alleged affair.

After a visit to the Bullenball, Michael Klarmann is shot. Ekki, who was standing right next to him, is injured. From then on, Ekki believes that he was actually the target.