Two years after London is struck by a devastating terrorist attack, it is cut off from the world, protected by a military force known as Choppers. The rest of Britain believes that the city is now a toxic, uninhabited wasteland. But Jack and his friends—some of whom lost family on what has become known as Doomsday—know that the reality is very different. At great risk, they have been gathering evidence about what is really happening in London—and...