Before the Nine Heavens were united, gods, demons, immortals, monsters, and humans each dwelled in their own realm, warring against one another for ten thousand years.
The Divine Kingdom used technology to control the order of the world, the Demon Dynasty subdued the heavens with martial arts, and the Immortal Sects sought to glimpse the heavenly Dao through arcane arts. The prosperous human world was merely the most fragile corner beneath the conflicts of the Nine Heavens.
Gu Hong was just an apprentice at a forge in a small frontier town. It wasn't until disaster struck and destroyed the city that he discovered the legendary "Nine Heavens Fragmentary Seal" hidden within him. It was the key to uniting the Nine Heavens, and the source of calamity coveted by every race in the world. During his flight, he met Shen Fengmang, a girl from the Divine Kingdom; Helian Zhengrong, a prince of the Demon Dynasty; and Yun Qingyuan, a disciple of an Immortal Sect. The four went from scheming against one another to facing death side by side, yet the unfolding of fate would lead them down different paths.