Shen Linglong, the legitimate daughter of the Shen residence, was once abducted. Because of this, the Song family publicly broke off the engagement, and her father, Shen Zhengyuan, listening to Aunt Feng's slander, wanted to drown her in a cage. At the critical moment, Lady Li of the Changping Marquis Manor saved Linglong using the Marquis Manor's marriage betrothal. Linglong and Marquis Li Chengyuan agreed that she would enter the Marquis Manor as his legal wife. Inside the manor, Li Chengyuan doted exclusively on his concubine Yunji, and domestic affairs were controlled by Mammy Sun. Linglong moved step by step, maneuvering among various factions. She reorganized the manor's accounts, defused inner courtyard crises, and dealt with troubles from her maiden family. Her half-sister Liuli was deeply calculating, coveted the Song family's marriage, and later attached herself to the Fourth Prince, Chenzhang. Amidst love, scheming, and the cracks of survival, Linglong sought her own way out.