Xia Xiaoxiang saves Marshal Lou and, bringing along her daughter Maomao, marries into the Marshal's Mansion to become the fourth concubine. The soft, sweet, and clever little Maomao is exceptionally endearing. Her gentle eldest brother is willing to take her for horse rides, her meticulous second brother carefully cares for her health, her fashionable third brother dotingly spoils her in everything, and her fourth brother—deeply trapped in gloom and disheartened by paralyzed legs—is also healed by Maomao, resolving to work hard on his rehabilitation. Even the stern old matriarch shows her immense partiality. The Lou family, previously plagued by conflicts and endless disputes, is healed by this unexpectedly arriving little darling. Her four brothers vie with one another to protect and pamper her, and the once turbulent Marshal's Mansion gradually grows warm and cozy, harmonious as a family, with all endeavors flourishing.