Mare Barrow’s blood is red — the color of common folk — but her Silver ability, the power to control lightning, has turned her into a weapon that the royal court tries to control.
The crown calls her an impossibility, a fake, but as she makes her escape from Maven, the prince — the friend — who betrayed her, Mare uncovers something startling: she is not the only one of her kind.
The poverty stricken Reds are commoners, living under the rule of the Silvers, elite warriors with god-like powers. To Mare Barrow, a 17-year-old Red girl from The Stilts, it looks like nothing will ever change.
Mare finds herself working in the Silver Palace, at the centre of those she hates the most.