IN A WORLD AT WAR WITH ITSELF Aaron Zeels and his family live their lives above ground, blissfully unaware of the impending attack from below. Joseph Wattsworth and his fellow Sweepers have been preparing for their invasion of the surface since they enlisted, now their time has come. A bizarre turn of events sees both worlds turned upside down as Joey and his surviving Sweepers become trapped on the surface, while Aaron and his family are mistakenly transported to the underground city. Now, trapped and surrounded by enemies, the two groups must do whatever it takes to survive as they attempt to get back home alive. A fast paced, futuristic thrill ride set in a war-torn world where half the inhabitants have been forced to flee under the surface, only to return to wage war on those who remain.