Eighteen months after the assassination attempt on his life, Senator Palmer (Dennis Haysbert, Far From Heaven) has been elected to the White House. Enjoying a relaxing day at his country retreat, he is informed by agents that there is a potential threat to national security. The L.A. Counter Terrorist Unit (CTU) are informed of the threat and told to be on high alert. Department head George Mason (Xander Berkeley, Gattaca) finds himself reluctantly having to call upon the services of retired Special Agent Jack Bauer (Kiefer Sutherland, Phone Booth). CTU have been tipped off that a nuclear bomb is set to detonate somewhere in Los Angeles within the next 24 hours.