Carolin and Moritz Seitz were once known as a successful couple of actors. But today she is considered the wife of a murderer: four years ago, Moritz Seitz was convicted of killing the former theater star Thore Bärwald after an excessive New Year's Eve party. Now Ole Stark turns himself in to the police. He is also an actor and claims to be the real killer. The public prosecutor's office cannot initiate new investigations, but they give Ballauf and Schenk a week to find out what is true about the story that is being served to them.

A young woman is arrested in an Asian shop. She is completely beside herself. Her clothes, hands and face are covered in blood. She is holding a knife in one hand. Did she commit murder? And what about the "Chinese dog" that is said to have seen everything?

The Dortmund homicide squad team is initially in the dark. But then the fine gold chain that the young woman is wearing around her neck provides a clue to her identity. A jeweler recognizes the piece of jewelry: he had made the valuable chain several years ago for the Dortmund steel dynasty Haiden family. The suspect is the 25-year-old daughter of the factory owner family. She claims to have killed someone, but can't remember anything. All in all, a murky case with traces from the Ruhr area to China.