Lin Chen, a modern 996 programmer, died suddenly due to overwork and traveled back to the Kaiyuan period of Emperor Xuanzong of the Tang Dynasty. He was possessed by a clerk of the same name. The original man died suddenly because he was involved in an imperial examination fraud case and was replaced by Lin Chen.
It combines the real official system of the Tang Dynasty with the fictional power struggle. Taking the "Three Provinces and Six Ministries System", "Imperial Examination Fraud Case" and "Jiedushi Separation" as historical fulcrums, the "Chang'an Chess Game" is constructed - all forces use the world as the chessboard and the protagonists as the chess pieces, but in fact they hide their identities as "game breakers".