Shen Yuejian worked hard to practice house fighting skills for fifteen years to become a "top concubine", but unexpectedly married into the Pei family as his wife when she was young. Faced with the cold-faced husband Pei Yan's "well water does not offend the river water", her skills were nowhere to be used. By chance, Pei Yan learned the tricks of the back house from her in order to deal with the disputes in the court. Shen Yue saw that he had spent all his money to teach others skills such as showing weakness and killing people with borrowed knives. Pei Yan was extremely talented and won many battles in the court. The two gradually fell in love during the teaching interaction, and changed from a contracted couple to comrades-in-arms. In the end, Pei Yan gained power and Shen Yuejian gained a happy life with the wisdom of the game between people.
