Xie Zhao, the former deputy general of Dayong Imperial Army, was imprisoned for being falsely accused of collaborating with the enemy. He was seriously injured but calm as iron. On the surface, he is taciturn, but in fact he has a photographic memory and is good at observing the terrain and military situation. In the name of copying Buddhist scriptures in prison, he secretly copied the enemy's defense plans with the intention of counterattack. His goal is to clear his grievances and destroy the seven tribes of Beidi. He is the chess player of the entire revenge chess game by cooperating with the hidden line in the prison. Shen Yandong, the daughter of the former Taishi Ling who was demoted as a clerk, is proficient in ancient military arts and coded runes. After her father was silenced, she disguised herself as a mute maid and lurked in prison. She recognized that the copybook copied by Xie Zhao was a military map, and secretly completed the incomplete parts to help him reconstruct the entire battlefield. He longed for the truth in his heart, but couldn't believe anyone, until he was moved by Xie Zhao's determination and grew from a bystander to a conspirator. The story surrounding Xie Zhao and Shen Yandong begins with a fateful intersection and gradually becomes involved in a larger relationship whirlpool and growth test.
