As a descendant of a family of traditional Chinese medicine, Lin Qingyue accidentally fell into a parallel time and space and transformed into a psychic white deer. She was rescued by Xuan Mo, the uncle of the Third Emperor, who was seriously injured. Xuan Mo was repeatedly plotted by the emperor. She used the body of a deer as a warning and repeatedly broke through the killings. However, she was defeated by him on the spot while delivering a message. In order to protect her, Xuan Mo was willing to give up his military power and take her to live in seclusion in the mountains. However, she turned into a human form on a full moon night and revealed the secret of time travel. The two traveled across the two worlds hand in hand, used modern medical skills and Taoism to treat ancient plagues, and used ancient military techniques to help break up transnational criminal groups. It wasn't until the eldest princess set up a desperate plan to kill the deer in the name of a monster from another world that she realized that her time travel was actually the beginning of a reincarnation of cause and effect a hundred years ago...
