The story takes place in the prosperous Tang Dynasty in the third year of Zhenguan. The West Market of Chang'an was bustling and noisy, with Hu merchants gathering and frequent trade in spices, silk, livestock, etc. However, behind this seeming prosperity, there are also various crises and challenges hidden. There was an undercurrent of power struggle within the palace, plagues among the people occurred from time to time, and mysterious evil things were at work in the dark, threatening the security and stability of the Tang Dynasty.
The protagonist Gu Qingshan was originally a top student majoring in veterinary medicine at the Modern Agricultural University. In an experimental accident, he accidentally traveled to the Zhenguan era and became the son of a poor veterinarian in Chang'an West City. The beginning was extremely difficult. His father was involved in a lawsuit for killing a pig, and his family was destitute. Gu Qingshan could only rely on his professional knowledge from his previous life to survive in Chang'an West City.
