Rick Waters is trapped. He and another survivor are stuck in the middle of a devastated Las Vegas, forced to hide while a band of criminals wielding stolen military-grade hardware loot the city. Any hope of escape rests on Rick's quick thinking, though that may not be enough. Back home in Virginia, his wife and children are preparing their homestead for an early winter that has arrived. The heavy snowfall is accompanied by the revelation of a strange secret beneath their home that may make their lives easier or even more dangerous.