A fictional nightmare becomes a reality as a vast armada of exotic alien warships unleashes a deadly assault. Utterly surprised, Earth's armed forces are crushed. Only the orbital space carrier Omaha and its experimental F-177 heavy fighters survive. London is burning. Los Angeles is devastated. The Amazon is crawling with alien forces. You and your elite squadron of crack fighter pilots must repel the marauding hordes and save the human race from total devastation.