A thousand years ago, the demons wreaked havoc across the Three Realms, slaughtering innocents everywhere. To restore order and stability to the realms, the Immortal Realm officially declared war on the Demon Realm. The two sides were evenly matched. To escape the demons' oppression, the Yao tribe sought favor with the Celestial Realm. While the demon army was away fighting, they invaded the Demon Realm, where only the old, the weak, women, and children remained. They killed the Demon Queen and kidnapped the young Demon Lord, presenting him to the Immortal Realm to force the Demon King to retreat.
A thousand years later, the Demon King's son, now the Demon Lord, has become one of Heaven's most formidable warriors: the Green-Faced King of the Underworld.
In the mortal realm, the cultivation era is flourishing. The renowned cultivator Wen Ying stumbles upon a demonic relic, a ringing bell, and nearly brings disaster upon the world. He sacrifices himself to the bell.
Decades later, the Green-Faced King of the Underworld is framed by the Celestial Emperor and sent to the mortal realm to undergo trials. In ten lifetimes, he is thwarted every time and fails to become an immortal. In his eleventh life, he becomes Yi Zhan, the senior disciple of the renowned cultivator Chu Yao, and meets Wen Li of the Wen clan. In the end, Yi Zhan dies and his soul is destroyed in this life as well, but something changes.
Wen Li makes a deal with the ringing bell. Over the course of three years, he gathers the scattered fragments of Yi Zhan's primordial spirit and offers his own body as a sacrifice to the bell.
Three years later, Yi Zhan returns to life.
The past will now be laid bare.
