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.

During a nocturnal chase in the streets of Bologna, a girl steals his gun from Coliandro. While trying to track down the unknown, the inspector comes across a dangerous criminal organization.

On the estate of a very wealthy man, an escort is cruelly murdered at the hands of a cold and determined assassin. The investigations lead Coliandro to confront the world of high class prostitution.

Coliandro gets involved in a bank robbery in the center of Bologna. The three robbers, young and inexperienced, are soon rendered harmless by three hostages, who, in turn, take the other people hostage.

Two gypsy girls steal something very important from the house of the wrong person, a corrupt marshal of the carabinieri, who, with an ambush, tries to take revenge. Thus, one of the girls takes refuge in Coliandro's house in search of help.

During the security service at the city stadium, Coliandro and agent Balboni arrest an ultra who had tried to stab a policeman: terrified of ending up in prison, the boy collaborates and provides the policemen with some important information.

Agent Gargiulo shows up at Coliandro's house in the middle of the night, drunk and with a bloody knife in his hand: the inspector tries to reconstruct what happened, but it doesn't seem easy.

The husband of an old Coliandro professor is killed inside the University of Bologna. The woman is accused of the murder due to the constant escapades of her husband: did she really go like this?

A young Muslim girl shows up in Coliandro's office to report the sudden and mysterious disappearance of her father. Reluctantly, the inspector still decides to do some investigation around the city.

In the trial against the boss of the Casalesi clan, the Bologna prosecutor's office has to rely on the testimony of Jelena, who now lives under protection. Coliandro, still in love with the woman, learns of her new cover and decides to go and see her. But there he has to contend with two fierce killers.

As punishment, Coliandro was transferred again, this time to the boring dog department. Here her sister comes to visit him, very worried about her daughter Angelica, who is dating a boy close to a satanic cult.