Lin Che never thought that Lin Yanqiu, her "brother" who had protected her for eighteen years, was actually a nine-tailed white fox that had lived for a thousand years. When he awakened his spiritual power in the burning pain of the leaf-shaped birthmark on the back of his neck, he realized that behind this protection was an obsession that spanned three lifetimes - three hundred years ago, he sacrificed his life to save a little fox and fight against evil cultivators, and that fox was Lin Yanqiu who fought for him against heaven in this life.
Pursued by the righteous, coveted by evil spirits, and punished by heaven... Lin Yanqiu was on the verge of danger several times to protect him. His nine fox tails were stained with blood, but he still protected him behind him. Lin Che read the past life agreement in the old bamboo slips, and heard the echo of reincarnation in the half copper bell: "Humans and monsters have different paths" is an iron law of heaven, but Lin Yanqiu insisted on going against fate.
When the blood moon tore the barrier apart, Lin Che grasped the awakened spiritual leaf power and entangled herself with the fox tail. Only then did she understand that fate is never a shackle. That Lord of Heaven and Tong Xing, as the astrolabe turned, had already tied the fate of the two of them to one another.
This pair of "brothers" who have been entangled for thousands of years will eventually use the spiritual leaves as blades and the fox tails as shields to find their way out of the rift in the heaven.