While Hajo takes piano lessons from Hanna Fröhlich, he is asked for help by her uncle Michael. Shortly thereafter, Michael is hit by a car and seriously injured. Michael believes that his family is behind the assassination attempt.
Visibly irritated, Phillip Bolte enters a pub, orders two beers and confesses the bartender to a murder. The bartender immediately alerts the police. During the interrogation, Bolte assures that he only fantasized about the murder.
Paul's class teacher was found stabbed. The suspicion falls on the problem student Darian, known for his aggressive outbursts. Ina Zimmermann learns that her son Paul has been heavily influenced by Darian lately.
Tom Kowalski is attacked at the ATM by a young junkie. He can fend off the attack, but lets the offender go. Apparently he knew him. Shortly thereafter, the Crystal Meth dealer René Makowski is shot.
Trumpet builder Peter Werth is kidnapped. The kidnapper seems to know the victim very well, which makes the investigators infer to a possible culprit from his environment. Jan Maybach is fond of the case, as he has recently lost his own father.
Eva Böhme, the "Queen of the Swan Pond", who regularly sells drugs to opera guests, is shot dead in a motel. A first track leads to the dealer Dunja Rattke, a competitor of the victim, who lost an important customer by Eva Böhme.
Jutta Wagner was found murdered in her pub. Since the "Golden Jutta" has not been running well for years, restaurateur Finn Kern wanted to buy the pub to turn it into a hip scene bar.
The adolescent Rico Möller was found dead in the park with stab wounds. Under suspicion is the gardener Piet Cornelis, who was previously attracted by violence and is now on probation.
Toms daughter Jackie begins an art study in Halle. But when Tom finds out who is Jackie's art professor in Halle, he gets worried: Jonas Korda was the prime suspect in a previous, unexplained case in which a student has disappeared.
The young professional climber Sofia Lasarew was found dead in a climbing gym. The circumstances of death are similar to an unsolved case. Finally a suspect is arrested for both cases. But he is murdered in custody.
The young trans woman Ria is murdered in cold blood. It is suspected a trans-hate crime hate crime, but Dagmar Schnee speculates a family motive. The suspects include Clemens Schnee, father of Ria and ex-husband of Dagmar Schnee.
When a man falls from the balcony, the investigators receive an emergency call. In addition, the young Sina Doberstein threatens to jump as well. But Dagmar Schnee can stop her at the last moment.
Investigators Ina Zimmermann and Kim Nowak are called to a murder that took place in the apartment building of Kim's mother Monja Nowak. Her neighbor Lazlow Trimmborn was killed with a gas pistol.
After the murder of two judicial officers, Dieter Landowsky, who was on the way to the public prosecutor's office because of drug trafficking, is now suspected and is on the run. His only confidante is his ex-girlfriend Anna Palaske.
