In Dortmund's Westpark, Jan Pawlak and Rosa Herzog stand in front of a large pool of blood, but there is no body. However, Andreas Richter, the head of a Dortmund real estate company, is missing. His business model has made him a number of opponents in Dortmund in recent years: he buys up properties in the Kreuzviertel and transforms shared apartments into sought-after luxury properties. In his personal life, he is currently divorcing his wife Natalia. She doesn't leave her husband in good stead either.

While Inspector Peter Faber has not yet come to terms with the death of his colleague Martina Bönisch, is on sick leave and is more or less living in his old Manta, Jan and Rosa come across Faber's father Josef. He and Faber apparently haven't had any contact for decades. What happened between father and son and what does Josef Faber have to do with the case?

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.