Zhu Ye, a graduate student in the Department of History at Peking University, suddenly lost consciousness when he touched a bloody Yongle Tongbao while visiting the Hall of Supreme Harmony in the Forbidden City. When he opened his eyes again, he found himself in the palace of Prince Yan in the thirteenth year of Hongwu, and became Zhu Di, who was only seventeen years old - the iron-blooded vassal king who would be difficult to seize the throne in the future and create the prosperous age of Yongle. He looked at the handsome young man's face in the bronze mirror. The Yongle Tongbao in his palm was still hot, and the gears of history had begun to deflect due to his arrival.
