When the virtual reality game "History of the Archana Continent" becomes tangible reality, players synchronized with their created characters emerge as the world's protectors. Lee Hoyeol, a former salaryman, inhabits Grandfell Claudi Arpeus Romeo, a demon hunter character he designed during his school years. What might ordinarily spell catastrophe instead grants him extraordinary advantage, as Grandfell's demon-hunter nature fuels overwhelming power against demonic adversaries. Now the world's only demon hunter, Lee Hoyeol must master Grandfell's true potential to navigate his mysterious destiny.