It began with a virus. Then a series of attacks erupted across the nation. Now the true invasion has begun, and a few powerful teenagers are America's only defense. Jack and Aubrey are the perfect team. Tabitha and Krezi would never have signed up for this... if they'd had a choice. And on the other side of the battlefield, Zasha is dedicated to the success of her country's plan. The time for choices is over-and the rush to the front lines is about to begin.