Xiao Hao (Zhang Zhehan), a graduate of the history department, was helping out at the museum where his senior (Medina) worked. He accidentally cut his finger and blood dripped into a red bottle. A miracle happened. A woman dressed in Qing Dynasty costumes appeared in front of him. She turned out to be Liuli (Sun Yaoqi) who was murdered three hundred years ago. After being frightened, Xiao Hao slowly accepted her existence and decided to help her solve the mystery of her life experience. During the investigation, the two discovered the harem murder case and the secret love affair of Kangxi (Wang Renjun), but they did not find out the mystery of Xiaoli's life experience. As their relationship deepened, the two sparked love. Xiao Hao did not want Xiaoli to return to that era, so he deliberately destroyed the investigation materials. The Academy of Sciences was preparing to euthanize Xiaoli, and Xiao Hao tried his best to save her, but after waking up, Xiaoli lost all her memories...