After clearing the game The Tide of All Under Heaven, veteran game power-leveling specialist Li Mingyi unexpectedly transmigrates into the doomed young emperor Chai Chengsi on the night of a coup. Facing pursuit by rebel troops, betrayal by the Empress Dowager, and an apparently inevitable death, he relies on his knowledge of the game's character secrets and future storyline. Accompanied by his female guard Wen Ran, he escapes the imperial palace, then disguises himself and returns to the capital under the alias "Heir of Guigu." Navigating the powerful nobles of the new dynasty, he attempts to use the secrets of the world as pieces on a chessboard to rewrite his own fate and that of everyone around him.