As the legitimate daughter of a wealthy businessman, I (Su Zhao) married into the infamous Dingbei Prince's Mansion on behalf of my concubine to save my family. He originally thought it was a fire pit, but on his wedding night, he discovered that the prince Xiao Chengyu was not the violent and dim-witted person he was rumored to be - he had a smile hidden under the red mole at the end of his eye, and the short blade in his sleeve reflected the candlelight, and he actually said: "Miss Su, what I want is someone who can break the situation with me." "From then on, I relied on the calculation skills I had developed in business to check his account books, break the drug bureau, and fight against the queen's house. I was able to survive step by step in the frame-up of Green Tea's sister-in-law, the scheme of the hypocritical noble girl, and the counterattack of the jealous concubine. And Xiao Chengyu's mysterious identity is gradually revealed: he is both the orphan of the late emperor and the master of the "Moyu Pavilion" in the world. In the tacit understanding of the unexpected encounter, we grow from chess pieces in the game to each other's game-breaker, and finally reveal the truth about the murder case in the court for twenty years, and bring peace to the world.