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.

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.

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 believes that Gamberini has relapsed into the old habit of gambling and, trying to help his friend, infiltrates a clandestine gambling ring. In doing so, however, he blows up an investigation already underway promoted by Longhi and puts Giacomino, who he has hired as a consultant, Gamberini and himself in grave danger. Thanks to the help of Ambra, the girlfriend of one of the criminals, the inspector still manages to get away.

Chief Inspector Vittoria Martello asks Coliandro to join the "Team", a team of superpolicemen who are opposed by Gamberini and other colleagues for their brutal and unorthodox ways. And in fact, thanks to Coliandro's entry into the Team, it turns out that the group is nothing more than a new gang of drug dealers and exploiters inspired by the action of the Banda della Uno Bianca.

Coliandro answers the mysterious phone call from a sensual female voice who tells him that there is a bomb ready to explode if he - and only he - will not rush to defuse it. But the bomb ready to explode is not just one.

Coliandro is contacted by a girl who needs help: her boyfriend disappeared after stealing a smartphone and finding footage of a gang of Russian criminals inside. The young woman turns to the inspector because she often hears him mentioned by her aunt, the deputy prosecutor Longhi, who however believes that Coliandro is not a good policeman.

Coliandro witnesses a clandestine race between two motorcyclists but one of them loses control and causes the other to fall, who is killed. The inspector and Buffarini manage to save the motorcyclist responsible for the accident and find refuge in the police station but will have to deal with the bloodthirsty boss of the area, brother of the deceased pilot, who seeks revenge.

Kayo, a young Japanese doctoral student in art history, is an involuntary witness of a ruthless execution. She casually runs into Coliandro, who decides to protect her and hide her at her house with Kenzaburo, her brother. The man, who arrived from Japan in defense of his sister, is a former repentant of the yakuza, the fearsome Japanese mafia, which is hunting them.

Coliandro seems to be on the verge of positively concluding a gallant adventure. But, at the climax, Giacomino shows up at his house, sleepy, hungry and with handcuffs on his wrists. The motivation is incredible: Giacomino is accused of being the author of a series of brutal murders. To help his friend, Coliandro will have to hunt down the real serial killer.

Coliandro is forced to be Paffoni's dance partner for one evening. To escape the thankless task, he finds himself investigating the murder of a young singer. To help him there is not only Paffoni, an experienced dancer, but also Natascia, the new young and beautiful singer of the smooth orchestra led by the shady Vasinto and his wife Ersilia called "Vagona".

At the Questura Coliandro meets Asmareth, a young and beautiful Eritrean cultural mediator who works for the police. Believing her to be an illegal immigrant, Coliandro puts together one gaffe after another. To make up for it, he agrees to help her in a research that the girl is doing on illegal work. Coliandro and Asmareth thus unmask a gang that organizes "manhunts" for bored provincial rich people.

Aurora, the beautiful and intelligent daughter of De Zan, falls in love with Coliandro. When the man wakes up from his coma, he finds the Inspector invited to his house for dinner. Meanwhile, the team investigates a mysterious man, Salvatore Maria Moneta, known as "the Ghost" who, thanks to his quick-change skills, always manages to escape the handcuffs.

Coliandro meets Thea, an ironic and provocative investigative reporter who, together with "Cinno", a young hacker, is investigating the affairs of Roman Kolas, an Uzbek entrepreneur who conducts very shady business under the facade of philanthropy.

Coliandro comes across Francesca Maria, the elegant and refined curator of a museum able, with her seductive qualities, to always get what she wants. Dazzled by the woman, the Inspector has to face Masino, an unscrupulous art dealer with a disturbed personality.

Coliandro investigates together with Jamila, a young and brilliant agent of the French services, on Tarantola, an apparently perfect policeman who, through the fixer "Don Lurio", is the terminal of a gang of corrupt agents.

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.

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.

Coliandro has to pretend to be a taxi driver for a trivial public safety operation, but a beautiful "nut" gets on board and the situation changes radically.

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.

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.

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.

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.