Ousmane is a suburban policeman of Bobigny financial department. Working undercover on a clandestine gambling joint case, he is the first to arrive on the scene. A single father, foolhardy and utopian, he is ready for anything to bring down a “big shot” that pulls the strings. Arriving on the scene shortly after and taking control of the investigation is the famous Parisian “Criminal Police Bureau”, headed by Captain François Monge. Francois doesn’t often get his hands in the dirt, so to see him outside of Paris is a rarity. Such a collaboration will have the two cops accepting each other, a premise far from given from the beginning.