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.

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.

While maintaining order at the city stadium, Coliandro and Officer Balboni arrest a football fan who had tried to stab a policeman. Terrified by the thought of ending up in prison, the boy cooperates and provides the police with some important information.

Officer 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.

In the trial against the Casalesi clan boss, the Bologna prosecutor's office must rely on the testimony of Jelena, who is now under protection. Coliandro, still in love with the woman, learns of her new cover and decides to visit her. There, however, he must contend with two seasoned killers.

As punishment, Coliandro has been transferred again, this time to the tedious canine unit. His sister comes to visit him, deeply concerned about her daughter Angelica, who is dating a boy associated with a satanic cult.

Natasha, a beautiful international assassin, arrives in Bologna pursued by secret services from around the world. Coliandro must defend her from them... and himself from her.

After a fall, Coliandro loses his memory and temporarily becomes a real tough guy, teaming up with a young nerd in the hunt for a gang of international terrorists.

After shooting two teenagers, Coliandro is forced to see a beautiful psychologist at the Ministry, who is dedicated to helping those officers most likely to use firearms.

Investigating the death of his cleaning lady's nephew, Coliandro uncovers an extreme fighting ring involving a series of wrestlers who are systematically drugged to relieve pain and fatigue. Helping him unravel the case is Veena, a beautiful and athletic fighter who escaped from this group of modern-day gladiators.

Coliandro witnesses an illegal motorcycle race between two riders, but one of them loses control and causes the other to crash, killing him. The inspector and Buffarini manage to save the motorcyclist responsible for the accident and find refuge in the Carabinieri station, but they must contend with the bloodthirsty local boss, the deceased rider's brother, who seeks revenge.

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."