Director Cedric Jimenez explores the perspective of the lead investigators of the French anti-terrorism services, working against the clock in the aftermath of the 2015 attacks across Paris. The unit led by Heloise and her closest associates, Fred (Jean Dujardin) and Ines (Anais Demoustier), having been caught off guard, assembles under immense pressure. With the Interior Ministry pushing for results, and almost overwhelmed with the weight of the responsibility, they're faced with the near-impossible task of catching the culprits before they can strike again.