The birth of Zhu Youyu was a conspiracy, a chess piece used by others. The birth of Zhang Siyan was a death, and his grandmother was an obstacle that had to be removed. So, Zhu Youjin became the Emperor who disguised herself as a man, and Zhang Siyan became the Queen who disguised herself as a woman. The two people who had lived in hypocrisy since they were young probed her step by step. They fell in love with each other little by little and relied on each other for their happiness and misfortune, so how could they change their lives and become the one and only empress in the annals of history?