A supernatural darkness has engulfed the Middle East. Millions of Christ-followers huddle in the red rock city of Petra and in pockets around the globe, threatened with execution for refusing the loyalty mark of Antichrist Nicolae Carpathia. The Tribulation Force, hunted as subversives and working against the forces of evil, race against time as Carpathia amasses the most powerful army in history. As the world hovers near destruction, the faithful scan the skies for any sign of their last and greatest hope—the Messiah.