In an era when humans and gods coexisted, King Mu of the Western Zhou Dynasty visited the Queen Mother of Kunlun. At the Yaochi banquet, King Mu fell in love with Qingqiu Fox Girl at first sight. After returning to the country, King Mu did not follow the Queen Mother Yaochi's agreement, but visited the Qingqiu Kingdom. The Queen Mother was furious and sealed Qingqiu with the power of heaven, and cursed the people of Qingqiu to never enter reincarnation for generations to come, and their souls would be scattered.
In order to cut off Qingqiu's hope, the Queen Mother spread rumors that wearing Qingqiu's fox skin can hide from the search of the messengers of the netherworld, and can also avoid the reincarnation of heaven. When the rumors spread, all the Taoists in the world hunted down Qingqiu's worldly people, almost escaping death. In the next hundred years, until the gods can no longer easily descend to the world, Qingqiu's disaster will be alleviated, but the curse will never go away.
The Qingqiu fox tribe can only grow tails by devouring their hearts in the human world. If they want to return to Qingqiu with all nine tails, they need to find a person for nine lives, fall in love with them, and dig out their hearts when their resentment is the deepest in each life, so that the nine tails can be perfected.