Four years after Jack Bauer went on the run, the CIA agents in London manage to capture Bauer, one of their agents called Kate Morgan suspects he is up to something and President Heller's condition is sparking worries with his staff.
Jack Bauer works with Chloe to retrieve a former member of her group who was selling information. President Heller's situation worsens after an attack and his condition appears to be worsening. Kate Morgan leads the hunt for Jack.
Jack Bauer takes hostages inside the embassy after being cornered by American troops, Heller makes contact with Jack after his speech to Parliament and Margot forces Naveed to pilot the drones and Kate takes matters into her own hands.
Tensions between Heller and PM Davies boil over, and one of them decides to take matters into his own hands. Jack proposes a plan to locate Margot by using someone unexpected as his bait. Jordan raises suspicions about Kate's husband.
Jack and Kate try to save the life of a key player tied to the threat. Jordan is ordered into the field on a perilous mission. Then, after Heller engages Margot to end her savage attacks, he faces a game-changing decision.
Jack Bauer and President Heller endure the unthinkable to thwart the terror attacks of Margot Al-Harazi. Meanwhile, Jordan faces a life-or-death struggle and Kate takes drastic measures to track down Margot before it's too late.
Jack and Chloe have a plan in place to eliminate the terrorist threat before any more attacks rock London. With no time to spare, Jack and Kate pursue crucial leads in an attempt to gain the upper hand on the intense circumstances.
Jack captures Navarro. Kate finds out her husband was framed for Navarro's crimes. Adrian and Chloe are taken hostage by Cheng Zhi who forces Chloe to fix the Override device and Mark surrenders Jack's locations to the Russians.
As the world teeters on a terror plot of mass proportions, Jack and the team reunite one last time to avert an imminent crisis. With no time left and the fate of free world on the line, Jack is faced with an unthinkable and grave decision.