Yang Qinghe is a painting seller in the desert, but many years ago, she was a monster hunter in the far east. Yang Qinghe was born in the Tang Dynasty, experienced the Anshi Rebellion, and witnessed the love-hate entanglement between Yang Yuhuan and Li Longji, but her mission was to catch monsters. Demons are different from ghosts. Ghosts are evil creatures from hell, but demons can be good or bad. Most of them are obtained through self-cultivation. Of course, some are formed by taking Taishang Laojun's elixir. However, it is difficult to determine the nature of demons, and these demons often have contact with people. Yang Qinghe's mission is to find good demons and enlighten them, and to find bad demons and seal them into the netherworld. This process has gone through dynasties, traveled through time and space, and we have to see through the world...