1Episodio 1
In the aftermath of the 2015 attacks in Paris, the DGSI and the DGSE must keep their rivalries aside and join forces to prevent future attacks.
2Episodio 2
Lucie is under pressure due to the search for Anis Bahri and Reda Kriket, as the DGSI is confident that the two terrorists are ready to execute their acts; Malika flips a jihadist in Syria with the aim of facilitating the infiltration of the Amniyat.
3Episodio 3
Ulysse's cyber infiltration helps Lucie and her team finally identify terrorists sent to France with the aim of launching an attack; Vincent must test his source to confirm its reliability.
4Episodio 4
Coalition strikes weaken the Islamic State, but they are suspected of planning a massive double attack on France.