At the year 2138 reality gaming is flourishing. Yggdrasil, there is a favorite game gently shut down. 1 player called Momonga decides to not log out. Momonga is subsequently converted to the image of a skeleton as"probably the most powerful magician" The world continues to change, with non-player characters (NPCs) beginning to feel emotion. Possessing no parents, friends, or set this average child Momonga strives to take the new universe the game has become over.