This is a world divided by blood - Red or Silver. The Reds are commoners, ruled by a Silver elite in possession of god-like superpowers. And to seventeen-year-old Mare, a Red girl from the poverty-stricken Stilts, it seems like nothing will ever change. But Mare possesses a deadly talent of her own. One that threatens to destroy the balance of power. Fearful of her potential, the Silvers hide Mare in plain view, declaring her a long-lost Silver princess. Knowing that one false move will mean her death, Mare must use her new position to bring down the regime - from the inside. Now Mare has entered a game of betrayal and lies.