As the Spirit Realm crumbles, the wasteful young woman Su Hanyue stumbles upon an ancient inheritance of the Immortal Ascendant. She then discovers that she shares a strand of divine soul with the mysterious banished immortal Ye Chenyuan. He is the Chosen One ordained by the Heavenly Dao, while she is the Calamity Star marked by it.
Taking the Immortal Ascendant Treasure Mirror, Su Hanyue begins at the lowest-ranked Canglan Sect. Despite her supposedly useless meridians, she cultivates the Immortal Ascendant path, overcoming prodigies in the sect competition and cleverly seizing opportunities in secret realms. Yet their bond of souls repeatedly draws her and Ye Chenyuan into danger. In the Nine Netherworld Hellfire of the Blood Palace, he forcibly suppresses the backlash of demonic energy for her; during the transformation tribulation in the Forest of Ten Thousand Demons, she takes the Heavenly Dao’s lightning punishment for him.
As they cooperate and mistrust one another, feelings begin to grow between them. Then they discover that they are actually twin divine souls formed when the ancient Immortal Ascendant fell. When the seal on the Spirit Realm weakens and the remnant soul of the ancient Demon Venerable awakens inside Ye Chenyuan, Su Hanyue stands atop the ruins of the sect with the Immortal Ascendant Sword in hand. Faced with the Heavenly Dao’s decree, “Kill the Chosen One to restore order,” she swings her sword and severs the chains of fate. “If the Heavenly Dao is unjust, then I’ll defy this world!”
Watch as these twin cultivators shatter the heavens with mortal bodies. Su Hanyue uses the Immortal Ascendant Treasure Mirror to reshape the laws of the Spirit Realm, while Ye Chenyuan wields the Netherworld Ghost Seal to command the order of reincarnation. At the moment the Heavenly Dao collapses, they ultimately use love as their guide to forge the Immortal Ascendant path anew.