Lu Changsheng experienced nine cycles of reincarnation, reaching the pinnacle of cultivation and proving himself an Emperor in every lifetime. Though he bore the Mandate of Heaven, he could never open the gates to the Immortal Realm. At the end of his ninth life, he was sealed inside an ancient coffin adorned with nine heavenly dragon patterns, where he slept through endless ages, awaiting his tenth reincarnation. The reborn Empress Leng Wushuang ventured deep into the Endless Demon Abyss to unearth the coffin, hoping to save her elder brother and protect her sect. She intended to reclaim the cultivation opportunities she had possessed in her previous life, but instead, she awakened an ancient monster who had slumbered for countless millennia.