Part of a motorcycle-mounted special forces group, Tom Marshall roams his section of the deep desert of western Iraq alone, intercepting Islamic State patrols that are surging across the region like a plague. Other riders are out there dead, alive and insane. When an early extraction date for the riders is given, Tom begins to withdraw. But what awaits him is a world of brutal survival where suicide grows more compelling with every step. His destiny will be shaped by the unforgiving winter conditions and the horror of religion at its most macabre. How far can too far go?