Shortly after being released from prison, an ex-convict is abducted by a masked stranger. This is a case for Inspector Jäger, who, due to a lack of work in the Calw homicide division, has to assist colleagues in other departments.

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.

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.

Because detectives Jäger and Kraft botched an unauthorized operation, they now have to face the consequences: they are demoted and placed under the command of their colleague Hoffmann. In their private lives, too, things are not as they should be. While Jäger is kept busy at night by his young children, Lola and Andreas' relationship is in crisis. The Calw investigators are really not having an easy time of it at the moment. And then there's their new case, which seems to be a tough one. When businessman Till Ritter is found dead, everything seems clear at first: suicide. But the matter becomes more complicated. Why was Ritter's daughter kidnapped? And what is his son Philip hiding? And what does the body found in a nearby lake have to do with it? The three detectives and their new colleague still have a lot of work ahead of them, because there is still a long way to go before all the questions are answered and the case can be closed...