Earth, 2508 A.D. Humans have spread across the six arms of the Milky Way Galaxy. The Unified Authority controls Earth's colonies with an iron fist and a powerful military--a military made up almost entirely of clones... Private first-class Wayson Harris was raised in a U.A. orphanage among thousands of clones born and bred to be the ultimate soldiers. But Harris isn't like the other Marines: he has a mind of his own. He figures he's paying for that...