Helmand Province, Afghanistan: a lone convoy edging its way towards a deserted mountain village is hit by a massive roadside bomb. But not all the Taliban voices heard on the battlefield are Afghan – some are British. Sean Dillon is put in charge of hunting the traitor down, and then a familiar, deadly face makes a dramatic reappearance. This time, Dillon will not only be going to war – the war will be coming to him, and he will learn that this Judas has al-Qaeda on his side ...