Hadrian's Wall in the third century is no place for modern-day soldiers to be cut adrift. Now the crew of a ditched army helicopter will be forced to suffer the brutal grip of Roman rule at first hand. Used to being the occupying power, they'll soon discover that the tables are well and truly turned. There's no way that ancient Britain is going to prove a sanctuary for this desperate group. In order to survive against a ruthly oppressive enemy, these soldiers will have to confront the unthinkable. They'll have to assume the mantle of the very insurgents and terrorists that they've fought and despised for so long in Afghanistan and Iraq. But who's controlling who in this twisting, enthralling thriller that spans three time zones? Nothing is as it seems in a novel that profoundly questions the nature of identity, loyalty and personal authorship.