A new case confronts Commissioner Borowski with grisly finds. In Kiel, the remains of human bodies appear in the sewers - teeth, hair, hip joints. They come from several bodies, and show clear traces of acid. Inspector Borowski and his colleagues are puzzled: where did the remains come from, how did they end up in the sewers, and how many people did they belong to?

What inspector Borowski hears and sees at the crime scene this time also exceeds his imagination: the pregnant Stefanie Brückner had her baby cut out of her body shortly before she was born. The mother is in mortal danger, there is no trace of the child. Frieda Jung surprises Borowski with the assumption that it is very likely a woman who cannot have children of her own, socially isolated and unmarried. A clever analysis, but Frieda Jung is wrong about one important detail.

Commissioner Borowski is on his way home from a fishing holiday when he is called for help at an unusual point: in the middle of the sea, on the way from Sweden to Germany, the captain of the ferry has disappeared without a trace. Borowski had seen him shortly before, when Captain Venske had been arguing with his First Officer Björndahl at the bar. Borowski has all the passengers on the ferry screened and reconstructs the captain's last hours. Even the first trace is strange: someone has opened the pilot door - the signal for an emergency. Did Captain Venske leave voluntarily, was it suicide, accident or murder?

It's a tough case for Borowski: The body of the eight-year-old girl has hematomas and a broken rib - both older injuries. The inspector takes a closer look at the family: Michelle's parents, Nadine and Thies Nowak, have financial problems and are struggling with enormous marital problems. To make matters worse, Nadine is pregnant, and then Thies' ex-girlfriend reappears on the scene.

A young woman has disappeared without a trace and her boyfriend, a beat cop, is convinced she was murdered.

A desperate call alerted the Kiel police emergency number: "He's in my apartment. He just comes through the wall." But for Carmen Kessler, any help comes too late. The young woman is found brutally murdered in her apartment.