The Princess's Mansion finally finds its real heiress, Yan Zhaozhao, and the fake heiress, Yan Chengxi, is publicly reprimanded by her brother. But Yan Chengxi turns the tables by demanding a blood test, only to discover that her brother is actually the impostor who was switched at birth. Yan Zhaozhao and Yan Chengxi join forces to face the challenges ahead, resolve a crisis at a birthday banquet, fight against schemes to force them into marriage, and compete for the noble title. Together, they gradually uncover the secret conspiracy behind the Princess Consort's scheme to switch the legitimate daughter with his illegitimate child and seize control of the Princess's household.