The story begins in Pakistan, with an American drone strike on the abode of terrorist-supplying arms dealer Aamir Barkawi, where a wedding appears to be taking place. Two years later, the unfortunate death of the British prime minister has many world leaders converging on London to attend his funeral. That's when the enemies of the Western world, led by Barkawi (who somehow managed not to die in the drone strike), decide to strike back, with an elaborate plot to assassinate all of the heads of state and to blow up all of London's most prominent landmarks, with many of the terrorists out and about in the guise of the local police and palace guards, making it difficult for the military to separate friend from foe. However, President of the United States Benjamin Asher is still alive, thanks to the continues heroic efforts of his Secret Service super-agent, Mike Banning, who must work twice as hard as ever before to make sure the terrorists don't succeed in their plan on kidnapping Asher and executing him live on world television.