In the final years of the Sui Dynasty and the early Tang, dynasties rise and fall in the mortal realm while undercurrents swirl through the world of immortal cultivation. The demonic sect Netherworld Sect plans to sacrifice lives amid the chaos to open the Nine Nether Demon Abyss, while the righteous Xuantian Pavilion joins forces with the reclusive Qingluan Peak to fight back. Hong Fu Nu bears the bloodline of the Heavenly Phoenix, while Nie Yinniang possesses the Shadow Spirit Physique. The two are destined to become the key to saving the world.