Cowardly boys 'Jak-gu' and 'Udon' fall into the glamorous remarks of 'Kok-doo', the owner of a stationery shop and in charge of ghosts in this neighborhood, and suddenly become secret agents for ghost tags. Two boys who fight at times, but as best friends, they help each other and fight to seal the evil spirits. Will they be able to seal the demons that are disturbing the world in a ghost ticket...?
