Shen Lingyi, the seventh princess who was not favored, encountered a request for marriage from Beidi at the palace banquet. The crown prince, instigated by the secret agent Qin Zhaoxue, publicly proposed sending her off for a peace marriage. Enraged, the emperor dethroned the crown prince on the spot. Amidst the turmoil, an old secret sealed for twenty years surfaced: Shen Lingyi is a descendant of the Luoshi of Shuofang, holding bamboo slips concerning border security. Coveted and schemed against by multiple factions, she found herself stepping into danger at every turn. Relying on her wisdom and endurance, Shen Lingyi saw through layers of conspiracies, ferreted out the rebellious party behind the scenes, broke free from her destiny as a chess piece, and no longer let herself be manipulated by others. Guarding her home and country, she firmly grasped her own destiny in her hands.