Herb-gathering girl Su Xiaoxiao ventured deep into the Forbidden Zone of Wangchuan to save her mother. She stumbled and fell into an ancient altar at the bottom of the river, where she inherited the legacy of Xi, the ancestor of all demons. Now the holder of the Demon Emperor's Seal, she can command every demon in Wangchuan. The strange phenomenon drew the three great immortal sects, who surrounded her, branded her an evil creature, and tried to seize her secret treasure.
While fleeing, Su Xiaoxiao encountered Lingxiao, a genius of the Xuantian Sword Sect who had been ordered to exterminate demons. Moved by her purity, and drawn to her by the resonance between her aura and his ancient bloodline, Lingxiao ultimately chose to save her. The two fled together. Lingxiao's immortal energy could neutralize the demonic power within Su Xiaoxiao, and dual cultivation allowed them both to advance. Their feelings for each other slowly grew, but the divide between immortals and demons stood as an insurmountable barrier between them.
As they flee, the two uncover the truth behind the ancient war between humans and demons, discovering that good and evil are merely lies told by the victors, and that a hidden mastermind is plotting to shatter the balance of the Three Realms. Before she becomes a demon completely, Su Xiaoxiao must undergo a transformation. Lingxiao must choose between his sect and his beloved. Their love will be key to resolving ten thousand years of hatred between humans and demons and restoring order. Together, they will seek a "Dao" that transcends factions and illuminates a world steeped in prejudice.
