Ji Wushuang was the lowest demon catcher in the Demon Slayer Division of the Yan Dynasty. He was born with a pair of yin and yang eyes and could see things that ordinary people could not. He has a low level of cultivation, but he repeatedly solves strange cases with his eyes. There have been a series of bizarre and violent deaths of officials in the capital. The deceased's body was as dry as a mummy, and no trace of evil was left at the scene. Ji Wushuang investigated for half a year and discovered that the murderer was actually the sacred beast enshrined by the Demon Slayer Division - a nine-tailed sky fox that had lived for three thousand years. Tianhu uses the life and soul of an official to extend his life, and his next target is the princess of the dynasty. Ji Wushuang, as a mortal, set up a trap to trap Tianhu, but at the last moment he discovered that there was something more terrifying than Tianhu hidden in the princess's body.
