After nine thousand years in the demon realm, Horang Baek returns to Earth as the Demon Lord and reunites with her only surviving family member. Time amongst demons taught her to act swiftly without mercy, but looking monstrous to her brother scares her more than death. As Horang reacquaints herself with earthly customs, she finds one thing hasn't changed—random guys throwing themselves at her. And if she thinks any left behind in the demon realm are history, she's in for a surprise.