"1999. A bitterly cold morning in the Brecon Beacons, and the soldiers trying out for SAS Selection are preparing to face their toughest test yet. Overseeing the soldiers is John Porter: once a promising young Blade, now a broken man and a drunk, seeing out his days in the Regiment Training Wing. But before the Fan Dance can begin, six masked gunmen carry out a devastating attack. Dozens of soldiers are killed. In the aftermath of the massacre, and with a government desperate for action, Porter and another surviving operator, John Bald, are taken to a secretive briefing in London. Their orders - to hunt down and kill those responsible for the attack."