On the way home from the third year of middle school. Han Dae-sung falls into hell without any context. At first, he wandered in hell for about a few days and despaired, but he said that he had to live. He starts fighting with the determination to return to Earth. Hell was like a game. A UI pop-up window like an RPG game appears in front of your eyes as a hologram, there is a status window, and you learn skills and acquire items.