Han Yixin, a modern white-collar worker and a beautiful girl born in the 1980s, accidentally traveled to the Kangxi period of the Qing Dynasty. By chance, she discovered that she was exactly the same as Nian Ruoxue, the sister of Fuyuan General Nian Gengyao. By mistake, Han Yixin replaced Nian Ruoxue and became the fourth brother Yinzhen's side brother. Han Yixin, who is well aware of history, knows that the fourth elder brother is the future Emperor Yongzheng, and that she is the historical concubine Nian of Dunsu. The fourth elder brother's younger brother, the fourteenth elder brother, is also ignorant of Han Yixin. The two-pronged crown prince Yinfeng and the Ba Ye Party group involve Han Yixin in a cruel struggle. Will Han Yixin, who comes from the future and has deeply studied the history of Kangxi, tamper with history? What was the reason that made Han Yixin travel through time again? What is the relationship between her and Hongli? Please look forward to the glory of three generations and the love of two generations.