In the Nine Underworlds, where the heavens, demon realm, and mortal world intersect, souls strive for reincarnation, guided by their cultivation. Young rebel Tong Feng is accompanied by Xuan Pei, the Lord of the Nine Underworlds, as they journey through ancient times, the Republic Era, and the modern world, forging a remarkable love story. Along the way, Tong Feng soon discovers that beneath the peaceful facade of the Nine Underworlds, dark forces are stirring.