Like Father Like Son - Aurelien lobbies hard to convince Munch to defend a guilty client for once: Paul Sauveur, who killed a young man attempting to hold up his veterinary clinic. The man wants to plead that he was acting in self-defense, but Munch soon finds out that he didn't tell her everything. Sauveur had a double life, and the victim is none other than his illegitimate son. Meanwhile, Bellanger, alerted by Joseph that his girlfriend has been hospitalized after taking an oral contraceptive, works on putting together a class-action suit in the interest of public health.