Former SAS Warrant Officer Joe Gardner has fought the Regiment's deadliest enemies, in some of the most desolate places on earth. And he's always won. Now he's about to face his toughest challenge yet. After losing his hand whilst on a covert operation in Afghanistan, Gardner is forced to stand down from active duty. Now he lives off the grid. But trouble finds him in the shape of a phone call from an old friend. Ex-Regiment legend John Bald is trapped in a bullet-ridden favela in Rio de Janeiro and a violent gang is out to kill him. Unless Gardner helps, Bald is a dead man. What begins as a simple rescue mission soon descends into a desperate struggle for survival as Gardner finds himself caught up in a conceit that stretches from the slums of Brazil to the frozen steppes of Siberia. Stalked by elusive MI6 agents and ruthless ex-Blades, Gardner must draw on all his training and instincts to hunt down the hardest target of all - before disaster strikes...