Imprisoned after the events of Season 1, Captain Lyès Benamar is offered a chance at release by going undercover as a drug dealer to infiltrate a criminal network led by his childhood friend Ali. As loyalties fracture and dangers escalate in Marseilles brutal underworld, Lyès navigates betrayal, moral ambiguity, and high-stakes police operations. The season ramps up the tension with intense interrogations, gang rivalries, and shocking revelations in six gripping episodes.