Alex Viniali, 46, divorced, estate agent and amateur football player, is found dead in a football locker room. The investigation reveals that he was also a member of a group of Lille hooligans, who had recently had a fight with a rival team. While Morgane gets her 15 year daughter Théa to do the internship of 3rd grade at the DIPJ, Commandant Karadec is troubled by a sexy dream with Morgane.