After their home planet was savagely destroyed, the Tyrank Empire is on the brink of extinction. Desperate for survival, the empire destroys planet after planet in search of a core sufficient for terraforming a new home. But after a long string of deficient planets , their odds are overwhelmingly stacked against them. As the fuel in their ships begin to deplete, and more and more tyranks grow sick, they finally discover a planet that contains the perfect core they need: Earth.
A day after the Tyrank Empire arrives near the Earth's moon, mankind finds themselves in an all-out global war with an alien race far more advanced than they are.
As the major cities perish, Aaron and his family, along with the rest of humanity, are chaotically hurdled into safe zones, but before Aaron and his family can reach one, their transportation is savagely attacked. One by one, the passengers are mysteriously taken, and due to Aaron's lack of strength, so is his entire family.
Filled with anger, Aaron with no hesitation joins the GAM, the Global Assault Military. There, he joins a band of unlikely brothers, training day and night to fight against a race that is trying to survive just like them.