Pei Yan, a doctor of history, woke up and became a young eunuch who entered the palace during the Yongzhen period. He knew that the Tang Dynasty would usher in the "Yuanhe Zhongxing" and quickly collapse, so he hid his modern soul and survived step by step amid the bloody strangulation of eunuchs and courtiers. He formed an alliance with Su Wan, an orphan girl who had sneaked into the palace incognito. One was the mastermind and the other was the sword. They used the power of Shen Cejun, Empress Dowager Guo's secret chess, and Tutu Chengcui's greed to stir up troubles in the Chang'an chess game. However, with every step he takes, he will come across lies behind historical records, and he will get further and further away from the original intention of 'changing destiny'. When the great cause of reducing the vassal state was entangled with old and new grudges, he discovered that he was not only a chess player, but also a chess piece that was backlashed by history. In the ups and downs of officialdom, who can have the last laugh? When a dynasty rises or falls, the person who holds the throne is not involved in the situation.
