Having no mandate to search the shed of Paulo and Francine, Constance and Jonas lose the opportunity to resolve the thefts at the campsite and the disappearance of Maurice Lauzon. Fred and Antoine meet the Jews to get their version of the facts about the Caffè Firenze murder. Constance and her team find those responsible for the kidnapping of Aldo Dipasquale.

When examining Maurice Lauzon's caravan, Jonas and P. Pineau discover two caliber 22 bullets and traces of blood. Maurice has not just disappeared, he may be dead. Constance learns that Serge saw the Orsini brothers near the naturist campsite on the evening of the disappearance. Police identify Stéphano Cozzolino's murderer using DNA found at the crime scene.

After their last visit to the naturist campsite, several strange tracks lead Constance and Jonas to suspect Paulo and Francine for the death of Maurice Lauzon. Is it the stolen objects or Maurice's body which is at the bottom of the lake? In the meantime, the squad is about to arrest Eddy Bazin.