Gu Yan, the school secretary, looks gentle on the surface, but is actually the last successor of "Yi Dao". He regards the heaven and the earth as his plate and the human heart as his son. He only enters the capital to destroy his enemies and find out the truth about the murder. In this game of chess, he risked his wealth and life, formed an alliance with the sick and weak prince, played against the current prince, and stirred up the situation in the Dayong Dynasty. When everyone thought he was a chess piece, little did they know that he was the only chess player.
