After 6 years undercover in Damascus, agent Malotru returns home in Paris but cannot forget his mistress Nadia, whom he fell in love with in Syria.At the DGSE, Malotru starts training Marina Loiseau, the Bureau’s future undercover agent in Iran. Meantime, agent Cyclone goes missing in Algeria after a DUI arrest. The entire department is forced to come together to locate him.

With Cyclone still missing, the Bureau now has to handle the exfiltration of another asset in Algeria.Malotru rekindles his relationship with Nadia, but his guilt and paranoia soon make him question her loyalty.At the same time, the Bureau is cleaning Marina’s record so as not to put her mission or “legend” at risk.

Malotru decides to test Gherbi’s loyalty by luring him into a trap. Nadia joins in on a mysterious meeting with other Syrians, but her regular “night-outs” soon arouse the suspicion of a Syrian agent, Nadim. Malotru finally confronts Nadia about her lies, demanding to know the true reason of her presence in Paris.In the meantime, Marina successfully infiltrates the Paris Institute of Earth Physics. But she is quickly put to the test when her superior asks her for a rundown on a subject she’s uncomfortable with.

At a French-Algerian meeting, Malotru attempts to read the other Algerian officers to find out whether or not they are holding Cyclone in detention.He also discovers that Nadia has been taking part in secret negotiations. Realising that their affair is putting her life in danger, Malotru restores his legend on his own and covers up his tracks from the DGSE to protect Nadia.Meanwhile at the Paris Institute of Earth Physics, Reza starts flirting with Marina, who must now find a way to rebuff his advances without humiliating him.

When Sisteron goes after Cyclone in Algiers, another agent known as Pigalle reaches out to Malotru with potential Intel about Cyclone.As Malotru struggles to maintain his cover & protect Nadia, he quickly comes face to face with Nadim, who is bent on unmasking his true agenda.Concurrently, the DGSI (General Directorate for Internal Security) subjects Marina to a tense interrogation, suspecting that she may be working for the Iranian Secret Services. Marina needs to maintain her cover at all cost.

While attempting to trade Pigalle’s Intel on Cyclone, Malotru must find a way to uncover the former’s true identity and underlying motive. Still on a mission to unmask Malotru, Nadim locates Prune and starts inquiring about Paul Lefebvre. Malotru gets rid of Nadim, only to realize that he is being followed by Russian agents himself.