The emperor’s authority is at its height, yet undercurrents churn through the court. The young Prince of War, Xiao Yu, commands a mighty army and has won countless victories, but his achievements make the court fear that he may overshadow the emperor. To placate this cold and powerful official, the emperor arranges a marriage between Prince Xiao, a man of immense influence, and the legitimate daughter of a marquis. The bride was supposed to be Su Wanrou, the legitimate daughter of the Marquis of Zhenyuan. But on the eve of the wedding, she suddenly “falls ill” (in truth, she runs away), and her half-sister Su Liyue is forced to take her place. Veiled in a red bridal sedan, Su Liyue enters the prince’s residence, beginning a legendary romance that starts with marriage and grows into love.