In the twenty-fourth year of Wanli, the waves and clouds in the court were treacherous, and the society and people's livelihood were in decline. Half a century later, the Ming Dynasty, which had dangerous mountains and rivers to defend and loyal people available, collapsed. Zeng Xiaoren, a modern high school history teacher, is humorous and imaginative in life. An unexpected accident reborn in the body of a young eunuch who had just entered the palace in the Wanli Dynasty. With his unique personality charm, modern perspective and historical knowledge reserve, he dances with danger time and time again and solves various bizarre and ghostly cases. He saved danger time and time again, battled wits and courage with the black hands in the DPRK, and finally uncovered the black hand hidden in the depths. Participated in pacifying the Bozhou Rebellion. The story explores the rise and fall of the Wanli Dynasty from a unique little person's perspective, and the time-traveling conversation with Emperor Wanli is shocking and answers Zeng Xiaoren's historical doubts. During this period, they gained recognition from the princess and traveled around the world. In the end, they gained sincere friendship and pure love. After success, they retired and lived in seclusion overseas, quietly watching the changes in history.