Shen Huaijin, the eldest princess of Daliang, has been ill for ten years. Coughing up blood, staying in bed, and not interested in worldly affairs. Fake. She is the master of the Dark Night Division and the biggest mastermind in the court. Until Pei Yanzhi, the Minister of Punishment, found her shadow. She saved him from execution and gave him a second life. "For my use," she said. He knelt down on one knee and said one word. What she didn't know was that he was the son of King Zhennan. And King Zhennan was the murderer of her mother. From chess piece to partner, from enemy's son to person for the rest of his life. When he said, "I am willing to follow the example of a dog or a horse," she thought he was just her most advantageous chess piece. Later, he spent his whole life proving that he was not a chess player.