The team duly suspects a connection when several gendarmes in a row are individually killed without warning. They belonged to the SWAT team of Alexandre Delmotte, who since surprising early retirement runs his own firm and lets an armed robber get away. They jointly came to arrest a reformed ex-con but fatally shot him at home, whose family swears he wasn't even armed, set up hastily. Surviving, still active SWAT men Nicolas Sorbier and mate refuse police protection, despite practically confessing the semi-accidental homicide, which the victim's kid brother seems to be avenging, but he's arrested. But the actual culprit proves far more dangerous, unresponsive to therapy and turning on gendarmes' loved-ones, even lieutenant Lucas Auriol's kid son Elliott at school.
—KGF Vissers