In the prosperous ancient city of Chang'an, there was a hidden monster hunter named Yun Qian. She has a light figure and an extraordinary aura between her brows. She holds the ancestral demon-catching gourd tightly in her hand and walks between the yin and yang realms, eliminating harm for the people. However, during a hunt for a cunning fox demon, Yun Qian accidentally triggered an ancient space-time magic circle, and was involved in a completely unfamiliar modern city - Xinghui City by a mysterious force.
Xinghui City is full of high-rise buildings and busy traffic. Coexisting with technology is people's indifference and forgetfulness of unknown forces. Yun Qian was dressed in ancient costume and holding a gourd. She looked like a fairy who had traveled from another time and space, which attracted the attention and admiration of the citizens. In this strange and prosperous city, Yun Qian quickly realized that despite the changes in the times, demons have not disappeared. Instead, they are even more hidden among the crowd, waiting for opportunities to do evil.
In order to find a way to return to ancient times, and to protect this new land from monsters, Yun Qian decided to stay temporarily and use his monster-catching skills to start a new monster-catching journey in this world where technology and tradition are intertwined.
At first, Yun Qian encountered a lot of misunderstandings and jokes because of her weird behavior and inappropriate words. However, her bravery and determination gradually won the respect and help of people around her. She met a group of like-minded friends: Xiaojie, an IT genius who is good at hacking technology, Lily, a mysterious girl with supernatural perception, and A Fei, a martial arts master who seems ordinary but hides his secrets. They were insisted by Yun Qian
