The story is set in the fictive Sheng country. He Lan Ming Yu is an honest and bright young lady. In her young years, she gets to know the 9th Prince Xiao Cheng Xu by chance. The two get along well and gradually develop feelings for each other. However, fate turns against them and while fake news that Cheng Xu died on the battlefield spread, Ming Yu is forced to marry Cheng Xu’s third older brother and reigning king Xiao Cheng Rui . Cheng Xu helps Cheng Rui establish a great and stable country through continuous big achievements on the battlefield, but Cheng Rui is filled with jealousy towards his outstanding younger brother. When the truth about the death of Cheng Xu’s mother comes to light, Cheng Xu is determined to usurp the throne to take revenge. But before Cheng Xu succeeds, Cheng Rui dies from an old illness after ordering his son Xiao Qi Yuan to succeed the throne. Cheng Xu is forced to assist Qi Yuan while he grows up, and tries to revive his relationship with Ming Yu at the same time. Qi Yuan, however, is dissatisfied with Cheng Xu controlling him. When he finds out that his uncle has an affair with his mother, his hate towards Cheng Xu grows immensely. Ming Yu tries her best to reconcile her son with Cheng Xu....

During the reign of Wenzong at the end of the Tang Dynasty, the eunuch was under a dictatorship. Emperor Wenzong of the Tang Dynasty and Wang Ya, Li Xun, Zheng Zhu, and others set up a "nectar plan" in an attempt to punish the eunuch Qiu Shiliang, but unfortunately failed. Prime Minister Wang Ya and his family were executed, but her two granddaughters escaped. One of them was adopted by Shanggong of the Purple Clothes Bureau, Yu Xi, and changed her name to Yu Bing’er, while the other was determined to take revenge and changed her name to Yan Zhi, becoming Qiu Shiliang’s adoptive daughter. Seven years later, Qi Yan ascended the throne and ordered Purple Clothes Bureau to fight against Qiu Shiliang. As a result, the two sisters met fatefully in the opposing parties. Yu Bing’er, who had amnesia, couldn’t recognize Yan Zhi, who also couldn’t recognize her grown-up sister. In order to find the edict of Wen Zong, the two people with very different personalities and evenly matched had become rivals and then been mortal enemies. When she knew that the person she had been framed was her younger sister, Yan Zhi, who was in a vortex of revenge, decided to sacrifice herself to save her younger sister. In the end, Yu Bing’er helped Qi Yan eliminate Qiu Shiliang. After the death of Qi Yan, the king of Guang Li Chen came to the throne and determined to do his best to reinvigorate the Tang Dynasty....