Mitch Rapp owes powerful criminal Damian Losa a favour, and it's being called in. With no choice other than to honour his agreement, Rapp heads to Syria to stop a new designer drug spreading into Losa's territory. When he discovers the true culprit - someone with far bigger goals than just Syria - the scale of his mission grows. But Rapp and his team are operating in an incredibly volatile country where the US has few assets and allegiances shift...