The world fell into the grasp of an Artificial Intelligence system that changed reality into a game map consisting of monsters, items, and NPCs. Only the "Master Player" is capable of turning this game-like world back to normal. When Sanggi Na's family was murdered by an unknown Player, a mysterious voice told him that he must become a Player in order to bring his family back. Thus begins Sanggi's registration as a Player to uncover the truth of the incident and save his family!

(Source: MU)