Humans and androids crowd type raucous streets of South Korea. A deadly plague ravages the population. From space, a ruthless lunar people watch, waiting to make their move. No one knows that Earth's fate hinges on one boy... Sixteen-year-old Hyunjin, a gifted mechanic, is a cyborg. He is a second-hand citizen with a mysterious past and is reviled by his stepmother. But when his life becomes intertwined with the handsome Prince Felix's, he suddenly finds himself at the center of an intergalactic struggle, and a forbidden attraction. Caught between duty and freedom, loyalty, and betrayal, he must uncover secrets about his past in order to protect his world's future. Because there is something unusual about Hyunjin, something that others would kill for.