A war between mafia clans appears to have broken out in Bologna. Around the same time, Nikita, a young woman working as a delivery driver, finds €250,000 in cash in a package. Frightened, the young woman goes to the police station where she meets Inspector Coliandro, who begins investigating.

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.

During a nighttime chase through the streets of Bologna, a young woman steals Coliandro's gun. While trying to track down the unknown woman, the inspector stumbles upon a dangerous criminal organization.

On the estate of a very wealthy man, an escort is cruelly murdered by a cold and determined hitman. The investigation leads Coliandro into the world of high-class prostitution.

Coliandro is caught up in a bank robbery in downtown Bologna. The three young and inexperienced robbers are quickly subdued by three hostages, who, in turn, take the others hostage.

Two gypsy girls steal something very important from the home of the wrong person, a corrupt Carabinieri marshal, who attempts to take revenge by ambushing them. One of the girls seeks refuge in Coliandro's house, seeking help.

Kayo, a young Japanese doctoral student in art history, unwittingly witnesses a ruthless execution. She accidentally encounters Coliandro, who decides to protect her and hide her in his home with his brother Kenzaburo. Kenzaburo, who came from Japan to protect his sister, is a former yakuza informer, a fearsome Japanese mafia who is hunting them.

Coliandro seems on the verge of a successful conclusion to his romantic adventure. But, just as things are going, Giacomino shows up at his house, sleepy, hungry, and handcuffed. The motive is incredible: Giacomino is accused of committing a series of brutal murders. To help his friend, Coliandro must hunt down the real serial killer.

Coliandro is forced to be Paffoni's dance partner for an evening. To escape this unpleasant task, he finds himself investigating the murder of a young singer. He's helped not only by Paffoni, a skilled dancer, but also by Natascia, the young and beautiful new singer in the liscio orchestra led by the shady Vasinto and his wife Ersilia, known as "Vagona."

At the police station, Coliandro meets Asmareth, a young and beautiful Eritrean cultural mediator who works for the police. Believing her to be an illegal immigrant, Coliandro makes one blunder after another. To gain forgiveness, he agrees to help her with an investigation she's conducting into illegal work. Coliandro and Asmareth thus expose a gang organizing "manhunts" for bored, wealthy provincials.