The young professional climber Sofia Lasarew was found dead in a climbing gym. It is not a tragic fall, but murder. The circumstances of death are similar to an unsolved case. Five years ago, the young police student Verena Wolter died. Finally a suspect is arrested for both cases. But he is murdered in custody. The killer must come from police circles. Did Verena's father, also a police officer, take revenge on his daughter's murderer? But Kim also has a motive. She was friends with the police student. Jan was under pressure after an investigation error. Prosecutor Binz starts the internal investigation.