In a world where some men become dragons at will, and some become dragons only at night to kill, twenty-five-year-old slayer Cajsa despises both, even if killing the latter, the Rogues, doesn't feel right, and she owes her people's overall safety to the former-the dragons of the sky kingdom. While her people are safe and many adore their protectors, that protection comes at a hefty price: Cajsa and women like her are expected to bear offspring for them-or die by way of banishment to the Realm of Rogues if they don't comply-and Cajsa never wanted her battlefield to be the birthing bed. So when she kills the dragon shifter who intended to mate with her after he discovers her using a contraceptive, Cajsa's only way to survive is to pin his death on Ozias, the charismatic, handsome Rogue dragon leader. Following him to his lands, Cajsa feigns her own kidnapping to gain time to plot her escape from all the dragons for good. In Ozias's realm, Cajsa learns the stories are true: that those who enter are cursed to turn into mindless dragons at sundown, left with only the desire to kill. As Cajsa morphs nightly into the thing she's been raised to loathe, her freedom is contingent upon one thing: help Ozias bring down Zhoric, the steely dragon king of the sky kingdom-the very man she's begun seeing in her nightly visions while in her beastly form-to break the curse affecting the Rogues. As Cajsa grows familiar with her dragon body, closer to Ozias, and curious with Zhoric's motivations, she discovers the truth about herself, her people's hidden past, and that there's more to Zhoric than she ever wanted to know. Bringing down the dragon king was never going to be easy-but now she doesn't know if doing so is possible while protecting her heart.