Luciera, who was born half-demon and half-human, was treated horribly and then executed by the human king, Levaitz. Right before she died, she traveled back in time. Determined to get her revenge on Levaitz, she heads to the demon lands. There, she runs into a boy named Dylan, who is supposed to be the next Demon King. Luciela decides to use Dylan's power for her revenge, but as he gets older, his feelings for her twist into a possessive obsession...