KRNetflix

Do Do Hee, the heir of the powerful Future Group, is cynical about love and trusts no one. Her life takes a dramatic turn when she becomes entangled with Jung Gu Won, a demon who can live for eternity by striking dangerous yet tempting deals with humans. After 200 years of looking down on humanity, Gu Won loses his powers when they become linked to Do Do Hee. Now, to prevent his own extinction, he must protect her—the woman who has unknowingly taken all of his supernatural power. In the process, their contract marriage turns into something far more complicated, blending danger, desire, and a connection that transcends life and death.