Kai has spent those years fighting for survival and trying to find a way rid the world of the disease his father created. His father was a military scientist charged with the task of perfecting a formula that would create a superior breed of soldiers. Like a virus, it soon spreads to the entire world, unleashing a period of unsurpassed chaos and conflict.
In the midst of this turmoil, Kai comes across a young woman named Clover, who is part of a clan traveling across the United States to try to find what is left of humanity.
Along the way they come across stragglers who join with the group as they journey across the upper part of what used to be known as North America.
One night while Kai and Clover were watching a meteor shower they meet a group totally out of this world. Together they begin a heroic journey, fueled by the increasingly dim hope that somehow, the human race will have a chance to start over.