To survive in a fragile human body, Seraphina must draw in supernatural heat. Her destined match is Caspian, the demon king whose blazing touch kills every woman who comes near him. What the court sees as a curse becomes the path she chooses: she wins his trust, rises from servant to queen, and falls deeper into his fire. But Seraphina carries a lethal secret—she was sent by the Crimson Empire to kill. Once the truth surfaces, she must choose between the empire that raised her and the one man capable of awakening her.