He Mian, a college student who has social anxiety, cleared his favorite game for the 100th time. Gareth, the devil of the game, accidentally transmigrated into the modern world where He Mian was. He Mian is determined to let the devil return to the game as soon as possible. In order to get rid of Gareth pranks and entanglement, the two must collect magical artifacts from the game which has been spread across the world when Gareth was traversing.