Wu Yatangli, the pearl of Northern Sai, fell in love with Yan Qingxuan, the Emperor of Yan. He once had his sole favor in the vacant harem. In order to uncover the rebels, Yan Qingxuan pretended to be his childhood sweetheart Zhao Bei'er and gave Tangli the soup to avoid being killed, turning her into a substitute. Tang Li was seriously ill, and her confidant Ah Shun was tortured to death. She was tortured to death and escaped by pretending to be dead. When Yan Qingxuan saw the coffin collapse, he regretted it too much. A year later, he went to Saibei and met Tangli under a pseudonym, who was married to his sworn brother Wu Yawenyuan. The Seven Princes who rebelled against the party joined forces with Zhao Bei'er to plot rebellion, and everyone was involved in the dispute. In the end, the rebels were executed, and Yan Qingxuan was seriously injured to protect Tangli and his daughter. All the regrets of his life were revealed, and the sadomasochistic love between the two came to an end.