Humans and androids crowd the raucous streets of New Beijing. 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 girl. . . .

Cinder, a gifted mechanic, is a cyborg. She's a second-class citizen with a mysterious past, reviled by her stepmother and blamed for her stepsister's illness.