Yoo-Eun wakes up to realize she's trapped in a game with no way out or possessions. Her only talent is creating fashion designs. While struggling to survive, she discovers Sheldon Street's shop and encounters a curious nobleman, Ashton, who implores for her help. Yoo-Eun is doubtful of his motives and wonders if they are sincere or dubious.
The heads of the two biggest corporations in X City are, unknown to most, a werewolf and a vampire. What's more surprising is that they were childhood friends. The werewolf, driven by his love for the vampire, offered to be his assistant and servant. Their forbidden love story began, merging the worlds of the supernatural and urban life.