The guys in the Regiment know they face their fiercest enemies when they fight the Taliban. No-one is tougher, more deadly -- or more cunning. When Taliban fighters trick a British army control into 'the kill zone', three Stinger missiles capable of carrying nuclear missiles go missing. The Prime Minister knows that Britain's allies, the Americans, must never find out about this massive cock-up. SAS legend Jack Harker is tasked to lead an eight man mission into a suspected Taliban facility, but he is suspicious about about what the aims of the mission really are - and it's all about to go noisy. Meanwhile in Belfast Siobahn Byrne, a highly trained surveillance operator, is infiltrating the drug crew of a former IRA commander. But are her motives professional or personal? Even she doesn't know any more. Neither Jack nor Siobahn can guess just how closely their operations are about to become, or just what's at stake. But as world leaders, including the American President, assemble for the opening ceremony of the 2012 Olympic games, that is about to become all too catastrophically clear. Taliban fighters have reconstructed the kill zone right in the heart of London...