Shen Linglong, the legitimate daughter of the Shen family, was publicly rejected in marriage and almost drowned in a pig cage. Fortunately, the Dowager Lady of the Changping Marquis Manor stepped forward, and she married into the Marquis Manor as a wife. After the marriage, she learned that Marquis Li Chengyuan had another favored concubine, Yun Ji, and their affection was all an illusion. Amidst family power struggles and inner courtyard intrigue, Shen Linglong walked step by step, gradually uncovering Li Chengyuan's hidden military exploit scam, the true identity of Yun Ji who was an enemy state's princess, and the bloody secret deep within the Marquis Manor.