The legendary online game Yggdrasil suddenly closes. Wanting to stay in his beloved world longer, the player, controlling a character named Momonga, decides to stay in the game until the servers are completely shut down. Momonga is a lich, the head of one of the top guilds representing the dark side in the game. At the moment the server was shut down, he gathered all his servants in the main hall of the guild, sat on the throne and began to wait for the inevitable. But the incredible happened: the server did not interrupt the connection, the game continued, and Momonga turned into a powerful wizard. Non-player characters suddenly began to show human emotions. Now, without any help, without friends and without any information about what is happening, Momonga will have to conquer this world to find a way out.