On their way home at night, Anne and René Winkler are attacked and brutally beaten by three young men. The police officers Rahn and Maurer notice this attack and take care of the two victims. But the perpetrators running away cannot recognize or catch them. Eva Saalfeld and Andreas Keppler begin to have doubts about the statements made by their police colleagues when it turns out that one of the suspected youths identified by Winkler's description is Rahn's son. They could understand that a father wants to cover for his son, but they do not find it credible that his colleague Maurer did not recognize any of the young people. Is he silent out of misunderstood friendship? The head of the department puts his hand in the fire for his police officers.
The young people are stubbornly silent and have carefully coordinated their alibis with each other - without witnesses to the crime, Saalfeld and Keppler cannot prove anything to them. When Mrs. Winkler dies as a result of the violent attack, the desperate husband, who feels abandoned by the police, tries to take matters into his own hands. The violence is spreading..