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

A suspect dies during a police operation in the tough Pilastro neighborhood, apparently killed by a gunshot fired 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 assigned to care for the victim's sister, who has arrived in Bologna from Africa.