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.

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.