In the early Ming Dynasty, Leng Shuangning, a disciple of the "Qingcheng School", went down the mountain to enter the world. In the process of seeking to solve the mystery of his own fate, he came across Zhu Yunwen, the "Emperor Jianwen" who left the city in disguise. And as the mystery of the emperor's life experience is gradually revealed, the king of Yan Zhu Di seeks rebellion, the "Jingnan Incident" breaks out, and the world is in chaos.