Pei Yuyan came from a scholarly family and was selected as a talent in the palace because of her talent and appearance. She amazed everyone with her song "Spring River Flowers and Moonlight Night" at the palace poetry meeting, attracting the attention of Emperor Xuanzong Li Longji of the Tang Dynasty.
Li Mo's true identity is a descendant of the previous royal family. The two gradually fell in love during their escape, but they both remained restrained due to the secrets of their respective identities and only expressed their feelings through music and poetry.