Fox has released the official synopsis for 24: Live Another Day.

Set and shot in London, the suspenseful event series once again will follow the exploits of heroic agent JACK BAUER (Sutherland). Four years ago, Jack was a fugitive from justice. Now an exile, he nevertheless is willing to risk his life and freedom to avert yet another global disaster.

Tracking Jack are CIA head STEVE HARRIS; CIA agent KATE MORGAN (Yvonne Strahovski, “Dexter”), who is both resourceful and ruthless; JORDAN REED (Giles Matthey, “Jobs”), a smart and sophisticated CIA computer tech; and ERIK RITTER (Gbenga Akinnagbe, “The Wire”), a sharp, strong and arrogant field operative.

Calling the shots is JAMES HELLER (William Devane, “The Dark Knight Rises”), now President of the United States. Heller is flanked by his Chief of Staff MARK BOUDREAU, who is married to Heller’s daughter – Jack’s former flame, AUDREY RAINES (Kim Raver, “Revolution”).

Meanwhile, a hardened CHLOE O’BRIAN (Mary Lynn Rajskub, “Firewall”), Bauer’s CTU confidante, is now working underground with high-profile hacker ADRIAN CROSS (Michael Wincott, “The Crow”). The harrowing day will have Jack attempting to thwart an unthinkable terrorist attack that could change the world forever.