Ji-o encounters a stroke of bad luck as she gets injured right before the national taekwondo squad tryouts. Nevertheless, her luck takes an unanticipated twist as she meets Gyeol, a mysterious man who impresses her greatly. Even though he has a classic delinquent personality with a kindness deep down, she finds herself inexplicably attracted to him. Nonetheless, with his dubious associates, is it worth risking it all to pursue a relationship with Gyeol?