In the middle of the Ming Dynasty, the eunuch Shen Yuan was forced into the palace by powerful ministers because of the hatred of his family and his family. He endured the humiliation and started as a young eunuch in the laundry room. With his extraordinary observation and careful mind, he worked his way through the palace of swords and swords. He had insight into people's hearts, weaved an intelligence network, and became the most indispensable "living file" around the emperor. When the emperor's new policy was ignored by powerful ministers and the fate of the country was in turmoil, Shen Yuan became the emperor's heart. He knew clearly that the emperor's "New Deal" was just a puppet show by powerful ministers, and he even knew that his former enemy was the mastermind behind it. The flame of revenge burns in his heart, and it is his bounden duty as a minister to assist the wise king and stabilize the country. Faced with the pressure of powerful ministers, the open and secret attacks of the harem, the contempt and contempt of courtiers, and the delicate relationship between monarch and minister with the emperor, Shen Yuan must make a choice between the blood feud and the common people in the world. Can he use the hands of the emperor to eliminate the traitors and reshape the Ming Dynasty without touching the taboos of power, and complete an epic story in which he defies heaven and changes his fate as a eunuch?