Xuanyuan Yu, the prince of the Jiang Kingdom, is deeply in love with the hostage Princess Gu Xinjiu of Annan Kingdom, and will do anything for her. However, Gu Xinjiu likes the despicable and shameless courtier Su Zichen, and likes him regardless of his status. Can she look back and see Xuanyuan Yu? Ning Shu'er, the daughter of Ning Hua, the prime minister of the country, is simple-minded and talented, and has the ability to govern the world. She is her childhood sweetheart with Xuanyuan Yu. Can she laugh with Xuanyuan Yu until the end?