Shen Yan, a modern second-generation rich man, found out that his girlfriend was cheating on him during Chinese Valentine's Day in his freshman year. He was humiliated and said, "What else do you do besides being nice to me?" From then on, he turned into a playboy who only plays games and is not responsible. After being killed by a sickly girl, he dressed up as Shen Man, the unfavored princess of Dajing - a man's heart and a woman's body, a perfect body that would be useless if not favored for a year.
In order to survive, he used business thinking to regard "Strategy of the Prince" as a KPI project. She was bored in the palace, so she casually "flirted" Zhonglie's orphan Zhao Zhiwan to relieve her boredom. This girl who is extremely short of love regards every kindness of the heroine as a "second light" and calls her "sister".
The battle for the throne between the Crown Prince and King Kang in the court became fierce. The heroine's relationship heats up while helping the prince to solve the problem, and she becomes pregnant after drinking. King Kang and King Yong conspired to assassinate the crown prince, his mother and his son. In order to protect his wife and children, the prince launched the Xuanwumen Incident - to kill King Kang and give King Yong his death. However, the prince's cousin Lu Yanci (Zhao Zhiwan's childhood sweetheart) died in the battle, and Zhao Zhiwan was poisoned in her wedding clothes in the mourning hall.
After the heroine faced sacrifice for love while holding her child, and completed the ultimate transformation of gender identity - "I am your mother", Shen Yan was completely dead, and Shen Man was truly alive. After that, she assisted the prince in stabilizing the court situation, reforming the Salt and Iron Imperial Examinations, subduing the disciples of the Zhou family, and became the queen regent. Emperor Jiaren dies, the prince ascends the throne, and the heroine is granted the title of empress.
