Marc and Vicky try to keep their relationship a secret from the outside world, but discussions about drugs and their opposing political views create tension. Franky gets to work as a security guard at a minister's private party. During a break-in at a supermarket in Nivelles, three people are cold-bloodedly executed, including a gendarme. The robbers lure a gendarme patrol and a police car into a deadly ambush; the Brabant Killers are born.

After several deadly raids, the Brabant Killers seem to have suddenly stopped their attacks. The investigation has stalled, and Marc has been transferred to a Gendarmerie department where he has to do administrative work, much to his frustration. Franky increasingly flees into hard drugs. Bouhouche is worried because Juan Mendez suspects him of stealing his weapons collection. Vernaillen continues to work on his private investigation and shares his findings with Marc. Vicky refuses to breach her duty of professional confidentiality as a lawyer to help Marc.