Li Xinghua, an ordinary scholar, lost his home to a demon beast. While fleeing, he stumbled into a secluded mountain valley belonging to Su Lingxi, a fox immortal from Qingqiu. At the time, she was still recovering from serious injuries and using plant magic to protect a spiritual leyline. But when she saved him, she revealed her true form as a fox demon. He had no aptitude for cultivation and only wanted to keep himself safe; she possessed the secret arts of the demon clan and was hiding from the pursuit of an evil cultivator. United by their shared goal of finding a century-old vermilion fruit to heal her, the two set off together.
Su Lingxi taught him breathing techniques, while he helped her with ordinary medicinal herbs and his knack for finding the way. They fought evil cultivators and seized cultivation techniques in Blackwind Ridge, then faced false accusations at the Greenwood Sect and broke into the Spirit-Locking Tower. The divide between humans and demons was as wide as the sky, and the rules of the cultivation world were sharp as blades. Li Xinghua left the sect and came to understand the “Way of Benevolence,” while Su Lingxi let go of her obsessions and awakened her nine tails. Through the deadly traps of sect turmoil, entanglements at Ten Thousand Demon Ridge, and the Cultivation Alliance's siege, they defied the belief that “humans and demons follow different paths.” Their mutual devotion resolved the murder of her mother and the conflict between their two worlds.
In the end, Heaven and Earth sent down a twin tribulation. A nine-tailed protective formation enveloped them in the spiritual power of benevolence. Together they weathered the lightning tribulation and defeated a powerful Nascent Soul foe. At the Fallen Immortal Cliff, they embraced the pillar of ascension light, combining “the mortal heart entering the Dao” with “the spiritual grace of the demon clan” as they ascended to the Immortal Realm hand in hand. Their legend of “human and fox cultivating together, true to their original hearts” lived on throughout the cultivation world.