Terrorists storm the British Embassy in Paris. Among the guests, French Defense Minister Philippe Bardin seems to be the real target of Jacob Pearce, a former legionnaire leading the attack. Vincent Taleb and Zara Taylor, two agents, try to protect the officials.

Vincent and Zara join an anti-terrorist task force set up to dismantle Pearce's group, more determined than ever to get revenge for having been betrayed in Afghanistan. They track down the trafficker of the weapons used in the embassy attack. Pearce designates his next target, Pascal Moulin, CEO of KMI Systems, a large company working in the defense sector.

The taskforce's investigations reveal that Pearce allegedly mentioned the name of a certain Cédric Duval. This man is allegedly involved in the operation that killed his partner and children. Vincent gets closer to the President of the Republic while Zara must manage aspects of her private life.

Zara and Vincent continue their hunt and finally understand how far Jacob Pearce is willing to go to get revenge and avenge the people he loved. They try to prevent Jacob from getting his hands on a deadly weapon, but Jacob always seems to be one step ahead of the task force. Vincent and Zara suspect the presence of a mole in their camp.

Jacob Pearce threatens the president and gives her a terrible ultimatum. Vincent and Zara's investigation progresses quickly, but requires sacrifices. Pearce also wonders what he is willing to sacrifice to get revenge.

Jacob Pearce is arrested; he has one last card to show. With the task force weakened, Zara and Vincent try to anticipate Pearce's next move. The president sees the situation worsen, putting the man she loves, her city and her mandate in a particularly dangerous situation.

Time is running out for Vincent, Zara and the rest of the task force. After Jacob's ultimatum, Zara and Vincent try to convince one of Pearce's allies to betray him. Juliette will face the worst situation.

As Jacob's plan is about to succeed, Zara, Vincent and Juliette fear they will have to give in to his ultimatum. A race against time then begins against Pearce who hits the target. Will they succeed in saving Paris?