Momonga is an average salary man who spends most of his time and salary playing the game of YGGDRASIL. Sadly Yggdrasil servers are about to be shut down and every other member of the guild of Ainz Ooal Gown have stopped playing. Deciding to stay in the game until the server goes down, Momonga goes and takes his place on the throne in Nazarick which is the base of Ainz Ooal Gown. Eventually the clock strikes for midnight, but instead of being forced out of the game, he finds himself stuck in the skeletal form of Momonga and the NPCs who should just be simple in game characters that his guild members had designed have instead become like normal living and breathing creatures.