Born into an elite military family inside the Limit, fifteen-year-old Harmony is committed to her country. Born on the outside of the Limit, where the poor were forced to create their own civilisation, fifteen-year old Hope is the country's most wanted criminal. From different worlds, Hope and Harmony have no reason to cross paths-until the day Harmony's brother, Raiden, is murdered. And Hope becomes the prime suspect. Now, caught in the ultimate game of cat and mouse, Hope is in a race for his survival while Harmony tries desperately to avenge Raiden's death. But in a shocking turn of events, the two uncover the truth of what has really brought them together...