At the heart of the BRI Versailles, a unit historically dedicated to the fight against high-level organized crime, Saïd is entrusted with the leadership of a team made up of elite young police officers: Badri, Vanessa, Julien and Socrate. He'll have to find his place within this group, introducing techniques that differ markedly from those of Patrick, the charismatic and esteemed former leader who maintains an ambiguous relationship with criminal Éric Perez, as a gang conflict threatens to set the capital ablaze.