Seized from the Nazis at the end of WW II, The X-O Armor has been property of the United States government for over 50 years. Decades out of use, its awesome capabilities are a complete mystery. That is until Donovan Wylie, genius of Silicon Valley, steps in and begins to unlock the armor's secrets. His work is timely, as high tech terrorist group R.A.G.E. has become a serious national threat. In order to combat them, the Army needs the X-O Armor, and a soldier with the mettle to wear it into battle.
When R.A.G.E. erupts in civil war, Citadel unleashes a high-tech weapon of such power that its activation draws the attention of a galactic peace enforcer, the Centaurian. Now X-O finds himself caught between his arch-enemy, Citadel, and the aliens who would bring him to brutal justice.