Mare Barrow's world is divided by blood—those with common, Red blood serve the Silver-blooded elite, who are gifted with superhuman abilities. Mare is a Red, scraping by as a thief in a poor, rural village, until a twist of fate throws her in front of the Silver court. Before the king, princes, and all the nobles, she discovers she has an ability of her own. To cover up this impossibility, the king forces her to play the role of a lost Silver princess and betroths her to one of his own sons. As Mare is drawn further into the Silver world, she risks everything and uses her new position to help the Scarlet Guard—a growing Red rebellion—even as her heart tugs her in an impossible direction. One wrong move can lead to her death, but in the dangerous game she plays, the only certainty is betrayal.

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. Pursued by Maven, now a vindictive king, Mare sets out to find and recruit other Red-and-Silver fighters to join in the struggle against her oppressors. But Mare finds herself on a deadly path, at risk of becoming exactly the kind of monster she is trying to defeat. Will she shatter under the weight of the lives that are the cost of rebellion? Or have treachery and betrayal hardened her forever?

Mare Barrow learned this all too well when Cal’s betrayal nearly destroyed her. Now determined to protect her heart—and secure freedom for Reds and newbloods like her—Mare resolves to overthrow the kingdom of Norta once and for all . . . starting with the crown on Maven’s head. But no battle is won alone, and before the Reds may rise as one, Mare must side with the boy who broke her heart in order to defeat the boy who almost broke her. Cal’s powerful Silver allies, alongside Mare and the Scarlet Guard, prove a formidable force. But Maven is driven by an obsession so deep, he will stop at nothing to have Mare as his own again, even if it means demolish everything—and everyone—in his path. War is coming, and all Mare has fought for hangs in the balance. Will victory be enough to topple the Silver kingdoms? Or will the little lightning girl be forever silenced? I