A young Yemeni boy is dead, maimed by northern highland tribesmen in the Hadhramaut Valley. The act was intended to send a message to the remote mountain town of Qasam, ordering them not to interfere with the business of the tribes. Slater sets off into the mountains in pursuit of vengeance. It was supposed to be a simple act of vigilante justice, but what he uncovers spells disaster for hundreds of thousands of innocent lives…