Hadrian's Wall in the third century. A country under the brutal grip of Roman control, and the last place a section of modern-day British Army soldiers would want to be cast adrift. Ever wondered what it was like to be on the wrong end of Roman rule in ancient Britain? The crew of a crashed army helicopter is about to find out. And used to being the occupying power, they'll soon discover that the tables are well and truly turned. In order to survive against a ruthlessly oppressive enemy, they'll have to do the unthinkable. They'll need to become the very insurgents and terrorists that they've fought and despised for so long in Afghanistan and Iraq. But just who is controlling who in this twisting, destabilising world? Nothing is as it appears in a thrilling novel that confounds all assumptions and sweeps back and forth across multiple time zones.