A butter boat on the Danube: the entertainer Rolf Gembel (Max Tidof) straightens his hairdo, puts the obligatory flower in his buttonhole and hopefully heads towards the stage in order to sell as many blankets as possible today. And then the unbelievable: like a still life, peacefully wedged together, ten people in the auditorium. Unconscious? Dead? A sign of life can only be found in Greta Wache (Renate Becker). The elderly lady, unable to be questioned, was brought to the clinic by Dr. Sion (Hannes Jaenicke) admitted. Inspector Ellen Lucas must assume a murderous robbery as all valuables, jewelry and credit cards have been stolen.
Toni Kehring, who was helping part of the group as a nurse and was observed fleeing the ship, is suspected of having committed a crime. Mysterious, tooStatements by his wife Anne (Jenny Schily), who runs a mobile nursing service and had contact with some of the victims. And Gembel also seems to know more than he cares to admit. Suddenly there is a new clue to the case: Ellen's landlord Max (Tilo Prückner), who is in the clinic of Dr. Sion to observe his heart, tells of an intimate encounter between Anne Kehring and Dr. sion When detective Lucas finds out that some of the victims at Dr. Sion was being treated and she gets in touch with his father (Hans-Peter Hallwachs), who vigorously propagates the right to a self-determined death, things start to move in the case.
The situation escalated when shortly afterwards the body of the nurse Toni Kehring was fished out of the depths of the Danube. When Greta Wache breaks her silence, light comes into the darkness of the case...

Twelve-year-old Sven Reimer (Daniel Spies) is found dead in a forest at a children's holiday camp near Regensburg. Commissioner Ellen Lucas (Ulrike Kriener) and her team are called to the crime scene. At first it all looks like a tragic accident, but investigators quickly uncover forensic evidence pointing to murder. The Lucas team is investigating under high pressure. Lars Berger (Aljoscha Sena Zinflou), one of the supervisors, has no alibi for the time of the crime and quickly becomes a suspect. Berger is from Africa, and Stefanie (Mia Sophie Wellenbrink), daughter of investigator Martin Schiff (Alexander Lutz), who is also spending her holidays at the summer camp, claims to have seen a black man near the crime scene. The children in the camp play the game: 'Who's afraid of the black man'.
But then the homeless Antholz (Peter Kurth), who was the victim of an accident near the quarry, is picked up. The forensic technology finds clear traces that convict Antholz as the perpetrator. Ellen sharply interrogates Antholz. Antholz admits to having found the boy lifeless in the forest, but vehemently denies the crime. Unbelievable for everyone, Antholz dies – during the interrogation – as a result of his accident. The case is closed for Chief Inspector Noethen (Michael Roll), but when Inspector Lucas discovers discrepancies in the profile of the perpetrator, she researches on her own. She checks into the Donauterrassen inn, which is located directly at the scene of the crime. There she recognizes the dark machinations of the inn owner Jürgen Müller (Bernd Tauber) and his daughter Katja (Alice Dwyer).
But the head of the Schweiger holiday camp (Robert Gallinowski) is behaving conspicuously, and supervisor Lars continues to refuse to reveal his alibi. After Ellen Lucas observes that the foster child Tim (Sandro Ianotta) reacts anxiously, she turns to the boy. What does Tim know, and what's up with the magic stone that disappeared without a trace after Sven's death? Tim, who, like his friend Sven, is a child in an