A Yue, the Qingqiu spirit fox, came to the world to find the lost clan treasure "Moon Soul Jade", but was accidentally bound to the "Symbiosis Curse" by the demon hunter Shen Qingci. From tit-for-tat confrontation to working together to investigate cases, the two uncovered the millennium secrets of the human and fox tribes hidden in the jade. They also gradually developed feelings during the test of life and death. In the face of clan rules and prejudices about good and evil, they need to break the shackles to protect each other.
