Six months after the battle in Fallen Soul Valley, Wuxian City is once again peaceful. But strange omens have begun appearing one after another in the Eight Scenic Places' ley lines. The waterfall in the Great Canyon of Baiyacao Gorge in Wuxuan has run dry, and wild beasts have gone mad. A thousand-year-old stele at the Pangu Shrine in Xiangzhou has cracked, stirring the ancient remnant soul of Pangu from its slumber as the ley lines tremble. The soul-corroding miasma sealed underground is leaking out without pause.
Fifth Sister Zhang Wanqing sets off alone to investigate Baiyacao Gorge, where she meets a hunter named Qingya. The two venture deep into the secret realm together. At Moonlight Pool, they witness an ancient vision of Pangu and his sister creating the world, and learn that to awaken their sleeping Eighth Sister, they must obtain Pangu's Primordial Dew from a hidden cavern. But opening the cavern requires the bloodline of Pangu's ancestors as a key, and Qingya is the only one who fits the bill.
As the soul-corroding miasma grows increasingly rampant, the ley-line tribulation of love descends with a thunderous roar. Unwilling to abandon her true feelings, Zhang Wanqing faces the storm of lightning and tribulation fire, successfully obtaining the Primordial Dew. To suppress the chaotic, turbid energy once and for all, Qingya uses his own bloodline as the lock's core, sacrificing himself as his soul merges with the mountains of Baiyacao Gorge, where he remains trapped underground forever.
The miasma disaster is quelled, but the battle has shattered the mountain's rock layers, leaving countless underground fissures as a hidden danger. Torrential rains are on their way to the southwest, and the threat of catastrophic floods is quietly brewing. The group hurries back to Fallen Soul Valley with the Primordial Dew, ready to awaken their Eighth Sister. But a calamity sweeping across southern Xinjiang is already drawing near, step by step.