Eden City, the second Las Vegas and a place where all pleasures of this world converge. Sarin comes to Eden City, trying to find the biological father of her niece, Hayan, using the diary of her twin sister, Irin, who died in a car accident. Along the way, Sarin encounters Owen, the king of Eden City. Though frightened by Owen's forceful attitude and the strange gaze that seems to desire her, Sarin chooses to stay by his side for the sake of her niece, Hayan. As she gets closer to Owen, she starts to uncover the darkness that looms over Eden City. Despite this, staying by Owen's side becomes more natural for Sarin. However, Sarin is also hiding a secret of her own