Police commissioner Herville is found dead in a Chinese restaurant in the 13th arrondissement of Paris. Gilou must break the news to Laure, who is being treated in a Police rehabilitation center. Now in charge of the unit, Gilou begins investigating with Ali, a young cop, fresh out of training. They quickly find themselves on the case of a break-in gone wrong and the trail of the missing 1,000,000 euros. As they delve deeper into the case, they uncover a network of corruption and betrayal that reaches higher than they could have imagined. With their own lives at risk, Gilou and Ali must race against time to expose the truth and bring justice to the commissioners killer. Will they succeed or will they become just another casualty in a web of lies?