Marc and his friend Franky embark on a career in the gendarmerie. The force is in a deep crisis after the drug penalisation of one of its officers was uncovered by Major Vernaillen.
After the attack on Vernaillen, Marc is protected by his new superior, adjutant Goffinard. Franky defends his superior officer, adjutant Debels, who went way out of line in a racist incident. In return, Debels introduces Franky to Group G, a shadowy organization of far-right gendarmes. Madani Bouhouche seeks revenge after his dismissal from the Gendarmerie.
Together with Goffinard, Marc discovers that there is a connection between several, at first glance unrelated, serious crimes, but Goffinard forbids Marc from sharing that info with other services. He doesn't want snoopers.
At a demonstration, Marc as a gendarme and Vicky as an activist face each other. When a group of students attack Marc, Vicky saves him, which brings them closer together.
Marc and Vicky build on their secret relationship, but discussions about drugs and their political antagonisms create tensions. Franky gets to work as a security guard at a minister's private party.
Vicky has graduated as a lawyer and now lives together with Marc, who is conducting a secret investigation into the Gang with Goffinard. Vernaillen is promoted and transferred.
Bouhouche is arrested for the murder of his friend Mendez. Together with Goffinard, Marc eavesdrops on prison conversations between Bouhouche and his wife. This is how they find out where the Brabant Killers weapons are located. During the observation of that place, a confrontation occurs.
