Due to an accident, the modern ordinary girl "Lin Wei" (non-historical/original character) exchanged souls with a little-known girl "Yehnala Jinglan" (fictional, distantly related to the core historical figure but not directly related to the plot) from the Yehenala family in the late Qing Dynasty. In a completely unfamiliar era, the two survive as each other, face the rules and dilemmas of different eras, and finally find their own value in their respective time and space.