When an armada of alien ships appears above Earth, the world is thrown into chaos. They warn Earth of an impending disaster, and whether by design or luck, Daniel Sojourner finds himself thrust into the center of an interplanetary conflict spanning back more than a millennium. As he becomes more intertwined in this conflict, he realizes that although billions of people have fought and died, nobody has uncovered the source of the impending disaster. As time runs out for the alien armada and for Earth, Daniel struggles to unravel the mystery of this conflict and his own murky past.