For years, Alina—True Dragon’s Daughter—has burned through her own lifespan to hold the Aeria Dragon Clan’s three princes in human form under the Dragon-Turning Curse. Then she overhears their promise to cast her aside for the adopted girl Sera, whose meek exterior masks ambition. Heartbroken after endless sacrifice, Alina ends the betrothal and accepts Sarien, the ancient black dragon, cutting off the True Dragon Power that kept the curse at bay. Once her support is gone, the curse rebounds, the princes begin to transform, and Sera’s schemes are exposed. Yet in the wake of this betrayal, revenge, and rebirth, the Dragon God’s ancient oath still hides an unknown cost.