While Trombetti is taking his niece Angelica home, accompanied by Coliandro, his car is rammed by a scooter driven by a Chinese boy who immediately vanishes into thin air.

A suspect dies during a police operation in the difficult Pilastro neighborhood, apparently killed by a gunshot from Inspector Trombetti's weapon. Coliandro investigates to try to exonerate his colleague.

A young black girl is killed during what appears to be a voodoo ritual. Coliandro is entrusted with the task of taking care of the victim's sister, who has arrived in Bologna from Africa.

A war between mafia gangs seems to have broken out in Bologna. In the same days Nikita, a girl who works as a pony express, finds 250,000 euros in cash in a package to be delivered. Frightened, the young woman goes to the police station where she meets Inspector Coliandro, who begins to investigate.