Marc and his friend Franky begin a career in the Gendarmerie. The corps is in a deep crisis after the discovery of the drug trafficking of one of the officers by Major Vernaillen. Marc is able to start as the major's secretary, placing himself at the heart of the internal struggle of the gendarmerie. Meanwhile, Franky is noticed by Madani Bouhouche, a gendarme who considers himself above the law. Franky's sister Vicky, who is a student at the University of Brussels distances herself from her brother and Marc because, as gendarmes, they are unpopular on the leftist university campus.

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.

Marc discovers, together with Goffinard, that there is a link between several, at first sight not linked violent crimes. But Goffinard forbids Marc from sharing that info with other services. He doesn't want any prying eyes. Franky gradually becomes entangled in the far-right network. Vicky misses her brother but fails to find Franky. Marc, on the other hand, secretly goes to the parties where Vicky is a DJ. Major Vernaillen becomes increasingly isolated.