The Winterfeld family experienced a tragedy years ago when their daughter Rosa, still a teenager but already the mother of a daughter, disappeared without a trace. Now Rosa's body is found near the Black Forest village. Just like back then, Franziska Tobler and Friedemann Berg are investigating. Just like back then, Meike Winterfeld blames Werner Tröndle, who has several previous convictions. He served time in prison for other crimes and now lives in the village again, even though most people don't want anything to do with him. Franziska Tobler and Friedemann Berg reconstruct Rosa's last evening again, not only with the family, but also with Rosa's boyfriend Axel and her best friend Elif. Now adults, the two of them are critical of this reconstruction. Franziska Tobler and Friedemann Berg still hope for new insights. And actually – with the way adults now look at things, the perception of events is shifting.

Shortly before closing time, a jeweler in Stuttgart is robbed. He himself is injured and his customer dies while trying to escape. The robbers' actions are similar to an attack from the previous year and so the Maslov and Ellinger families, who are related by marriage, become the focus of Thorsten Lannert and Sebastian Bootz's investigation. The adult members of the family have a lot of experience in deflecting police inquiries and providing alibis. That leaves 13-year-old David, who is housed in a youth home. The detectives suspect that the teenager, who is underage, was employed as a guard during the attack. The social worker Annarosa, who looks after him, defends the boy with complete conviction and in principle doesn't make any effort to support the police; she doesn't think much of state rules.

Hansi Pagel has been in prison for several years, convicted of violence against his wife Andrea and their children. He comes into the focus of inspectors Franziska Tobler and Friedemann Berg when the psychologist and psychiatric expert Lisa Schieblon is found strangled in the trunk of her car.