Four kids are driving through the desert on their way to the beach, their faces anything but cheery. This isn't Spring Break. They're trying to outrun the end of the world-and each other. Determined to elude the deadly virus, Danny, his brother Brian, his girlfriend Bobby and Danny's school friend Kate speed across the Southwestern U.S. to reach the place of possible safety. Over the course of four days, the group is faced with moral decisions that no human should ever be forced to face. They discover that their greatest enemy is not the microbe attacking humanity, but the darkness within themselves.