In the fourth year of Jianwen in the Ming Dynasty, Zhu Di led his troops to capture the imperial capital Yingtian. The imperial censor Jing Qing and his wife died. The eldest daughter Ruowei was rescued by the deputy general Sun Yu, and the second daughter Manyin was rescued by the crown prince Zhu Gaochi. The flesh and blood brothers, one in the palace and the other in the rivers and lakes, grew up together. Ten years later, Ruowei followed a group of orphans of the Jingnan Rebellion into the city to assassinate Zhu Di. The assassination failed. Ruowei encountered the crown prince Zhu Zhanji. The two young people were enemies or friends, and they had their own fate. As fate would have it, Ruowei and her sister Manyin married into the palace at the same time, and witnessed the country recovering from chaos, pacifying the border, moving the capital, opening the canal, Zheng He sailing to the West, making a name for himself overseas, compiling the "Yongle Encyclopedia", and the prosperity was about to come. Ruowei was determined to give up her obsession and assist her husband Zhu Zhanji who ascended the throne. Before her husband died, she vowed to protect the country for him. She experienced the Battle of Beijing, reused her modesty, saved the Ming Dynasty from danger, and wrote a glorious page in Chinese history.