Kyungsoo has to follow his older brother, Kris, who moves to Seoul because of his job. In the new city, Kyungsoo hopes to start a new life, especially after his heartbreaking because of his girlfriend’s cheating. But, what happen when one night he meets a mysterious thief who has been shocking Seoul’s citizens because of his brilliant actions? Wad what will happen when Kyungsoo realizes that the mysterious thief turns out to be a person who always revered as the most popular charming kingka in his new school?