Through an inheritance, a group of friends find out that their grandfathers had found crates of gold in the wreckage of a crashed plane in the final days of the Second World War. A short time later, the men were killed and the gold was never found. Now the gawky grandsons are trying to recover the treasure. In the process, they come up against crooks, speculators and old and neo-Nazis.

Inspectors Karl Jäger, Lola Kraft and junior police officer Jasmin Stein must solve the brutal murder of a hunter whose dismembered body was found in the middle of the forest. The investigation points to illegal arms trafficking and initially leads to the Reich Citizens' milieu. Another blood trail was also found at the crime scene...

A supermarket is robbed. Commissioner Karl Jäger, who happens to be present, shoots the robber and is subsequently suspended from duty because the attacker’s weapon is not found. The incident also plunges Jäger into deep psychological problems. As a result, commissioners Lola Kraft and Jasmin Stein are called in when two bodies are discovered during the night of a class reunion at the Calw Hermann Hesse High School. All 29 party guests are considered suspects. When the investigators find out that their suspended colleague was a former classmate, his memories help advance the solution to the case, which has its origins in their school days.

The young and attractive police inspector Lola Kraft loses her partner during a botched operation in Stuttgart and is subsequently transferred to the supposedly quiet town of Calw as a form of punishment. But right away in her first case, which she has to solve with her new partner, the easygoing and somewhat washed-up detective Karl Jäger, she is confronted with a brutal murder: psychiatrist Dr. Claudia Kretschmer is found dead.

Detectives Karl Jäger and Lola Kraft are investigating again. An inconspicuous family man saves a young woman from being raped and uses unexpected skills that not only attract the attention of himself, but also of the police. But it is not just his mysterious past that troubles the amnesiac victim, but also a killer squad. Who is after him? And what is the mystery of his past?

Nikolaus Kaminsky is a former police profiler who has been living in seclusion for 20 years, with no contact with the outside world. Only his neighbor's daughter Simone manages to coax him out of his shell from time to time. When he threatens the 12-year-old with a knife for no apparent reason one day, detectives Jäger, Kraft, and Hoffmann are called in. The police are actually busy with a kidnapping case, but when Kaminsky casually leads the investigators to the solution of the case, a long-forgotten case of child murders suddenly becomes relevant again. The last victim of the serial killer, who remains unknown to this day, was Kaminsky's daughter. When Kaminsky then warns the police about a new kidnapping case, the suspicion arises that the killer, believed to be dead, is back at work.