What's a toothache when your superior Brandner unexpectedly sends a young colleague to your side – for training purposes. The Munich chief inspectors Franz Leitmayr and Ivo Batic are polite and not at all uninterested. The young colleague is gaining more and more plus points.
On a routine business trip, the three find themselves in a precarious situation. In a burning car in front of a farm, they can see the outline of a person before the car explodes. In the window of the adjacent farm they see the silhouette of a man.
Leitmayr wants to ask the man. Shots are fired. Leitmayr scores three times. Siggi Aumeister collapses and falls into a coma.
The internal investigations immediately begin to take effect. Franz Leitmayr has to give up his gun to secure evidence. His office is searched - routinely for alcohol and drugs. According to the regulations, the police officer Leitmayr is offered a leave of absence after "firearm experiences". He must testify before a commission of inquiry. Investigator Maus acts particularly sustainably in this context. Why didn't Leitmayr recognize that his opponent's weapon was a "replica"? A psychological consultation is pending: therapist Sophie Wiesmann refuses to prescribe sleeping pills for the patient Leitmayr.And Batic of all people testified to the investigative commission that Leitmayr took painkillers on the day of the crime. Why is Batic stabbing his longtime colleague Leitmayr in the back?
But it is far worse to face the parents of the badly injured Siggi. Schorsch and Elisabeth Aumeister run a long-established hardware and household goods store in the immediate vicinity of Leitmayr. Mother Elisabeth and father Schorsch know Franz Leitmayr as a customer. They have no idea that he of all people fired the shots at their beloved son.
There are vending machine pictures in which Siggi Aumeister happily poses with a woman. But nobody in the family wants to know Adriana Kaminski. The older son Markus no longer lives in the parental home. As the deputy branch manager of a hardware store, he leads an independent life. But the facade is crumbling. There was a robbery at the hardware store in which brother Siggi was allegedly involved.
What secret is the family hiding? When Siggi dies in the hospital, the signs for Chief Inspector Leitmayr within his department are upset. And not only there.
Mother Elisabeth is torn between her love for her husband Schorsch, who has innocently got into debt, and her two sons. And she knows exactly: if the shop dies, Schorsch dies too.