The vast land is only square, and Yan Bi can divide the world into four parts. Fifteen-year-old Prince Zhanghua of Yan was originally destined to marry Xie Fanyi, the third daughter of the Xie family, as his concubine. Unexpectedly, Xie Fanyi died on the way to get married. Two years later, the new emperor chose Yi's sister Chang Yan as his queen. In this way, the thirteen-year-old Xie Changyan bid farewell to his father's family, left his hometown and came to the imperial capital, where he learned etiquette and waited for his haircut. Waiting to become a queen. A legend begins.