Mick has quit the police force and lives in a cabin in the woods. His colleagues miss him, especially Andreas, who has to deal with Mick's nerdy successor. But Mick has no intention of returning; he is too disappointed in his former friends and colleagues. That changes when Andreas has to solve the murder of a taxi driver and discovers that the murder weapon is the same gun that shot Mick into a coma!

One night, bachelor and bon vivant Sascha König is shot dead in a car repair shop. The first clue leads Mick and Andreas to Dr. Matthias Schatz's fertility clinic. But the chief physician claims innocence and ignorance. Sascha had been in frequent contact with the pretty Ina Richter lately. This did not escape the attention of his girlfriend Leonie... What she did not know, however, was that Ina is happily married—to a woman.