Lothar comes across some astonishing evidence in his hunt for the person who posted his call online. Meanwhile, Henning is suspended from the force, and Rosa seems to be getting closer and closer to her goal.

Dirk, Harry, and Katja speculate about why Rosa would make up such an extreme story about Henning. Henning himself wants to confront Rosa, but Harry stops him; meanwhile, Dirk and Katja pay Rosa’s absentee father a visit on his ship.

Lothar and Nicki find their suspicions about Commissioner Küppers confirmed. Meanwhile, Rosa's father shows up unexpectedly at the family home.

Before Lothar can confront Ms. Kuppers, she sends him and Nikki to check on Mr. Würfelkrütz, where something is amiss. Meanwhile, Rosa realizes that the seriousness of her allegations and tries to contact Henning.

As Mr. Ellwanger gets caught in the act, Henning decides to meet up with Rosa after all. But then Rosa's father turns up unexpectedly...

All's well that ends well! Rosa admits to having made up everything in order to get her father's attention, which means Henning can be reinstated; meanwhile, Lothar finally cracks his case.

A new start, lonely hearts listings, and secret gifts at the police station—and so begins a new installment of this series.

On a boat in the harbor, two teenagers meet by coincidence and under different preconceptions. One is off to meet a mysterious man who she claims is dangerous, while the other says the boat belongs to his father. Meanwhile, a cop on the night shift tries to sell his old van.

When he witnesses the lovely girl he's just met get shot, Elias calls the police, but he doesn't want to give his last name.

Nina and Paul arrive at the scene and find a man's wristwatch near the victim, who is around the same age as Paul's daughter. She still has her wallet, but it looks as if her cell phone has gone missing.

Mirko, an acquaintance of Daniel's, turns up at the police station with a question concerning a "friend of his" who has lost a gun... At the crime scene, two detectives make it clear to the other officers that they will now be taking over the investigation.

Dirk Matthies is still puzzled as to where Elias got his cell phone number. The detectives from the homicide squad come to his office to ask about it and their conversation is not exactly amiable.

With the help of surveillance camera footage, the officers from the 14th precinct discover that someone rode the victim's bicycle and then got on a train. Of course, this is Elias, the young man Dirk is trying to protect.

After a photo of Elias is released, Dirk has to try to find him however possible. Meanwhile, Nina and Paul try to take care of the financial issues they are each having.

The young suspect is spotted riding a woman's bike around town, so the patrol team sets out in pursuit, as do the homicide investigators. It's clear that the two teams really don't get along.