Eighteen years ago, Xue Yan's identity was changed by her mother and her cousin Xie Fangfei, and she was forced to enter the palace for each other. Her best friend Han Ji also chose to favor her cousin. Xue Yan went through many hardships in the palace, but fortunately he was supported by the current emperor. Many years later, she returned as the eldest princess. In the past, everyone still tried to seize the position of crown princess. Xue Yan publicly exposed all the misdeeds of the conspiracy and the Han and Xue families. With solid evidence, a group of evildoers were punished. In the end, Xue Yan was appointed as the queen, stayed with the emperor, and started a new life.