On an Earth that is very much like our own, the civilizations of ancient man have been crushed; the giant glaciers that cover the northern part of the globe continue, even now, moving ever south, grinding the remains of the sky-touching cities of men beneath them. This Ice Age created warfare between two mighty nations, and in the midst of this mechanized slaughter, a virulent influenza plague ultimately killed most of the human population of the Earth within just one year.
America's worst fears are realized when a hospital is the target of a suspected terrorist bombing. As our first responders descend on the area, a discovery is made that will change the course of human history. Three aliens emerge from the wreckage, and three humans are chosen as Earth's champions. Will the bond they share be enough to save us all from destruction?