Michele and Rosario, childhood friends, grow up in Marcianise, a town in Campania where the laws of the Camorra prevail over those of the state. However, the two men have different destinies: Rosario becomes a crime boss, while Michele, after being arrested for murder and released from prison, discovers the world of boxing thanks to his trainer Sabatino (Giorgio Colangeli). Seeking a definitive change of life and emancipation, Michele moves to Berlin, where he is introduced to the underground boxing circuit.

In 1951, in Saint-Germain-des-Prés, the private detective Nestor Burma was commissioned by an insurance company to find stolen jewelery. The deal seemed easy and Burma got an appointment with a well-known black trumpet player in the neighborhood who could provide him with information. But the musician does not come and we find him murdered. The investigation becomes more complicated and Nestor must find an alibi so as not to be suspected of the crime.