Gelun, the most powerful hero of all time, perished alongside the Demon Lord in a battle that shook the heavens. Five years later, he awakens from death… but not in the way he expected.

His soul has been reborn into the body of the weakest, most despised demon in the entire infernal realm. A cruel twist of fate: the ultimate symbol of justice, now trapped in the most pitiful form among the forces of evil.

But destiny hides unexpected secrets. His human soul awakens an ancient power that had long slumbered within that demonic body: the evolutionary force of the Ancient Serpent God, a primordial might capable of turning the weakest creature into the ultimate predator.

Gelun, once legendary for using ruthless methods to protect justice, now wields a demonic body and a power beyond all comprehension. What kind of bloody storm will he unleash when the most fearsome hero in history is reborn as the most dangerous demon?

In a world where the lines between good and evil blur, one question echoes: can a hero keep his soul pure when his body is doomed to destruction?

The answer will be written in blood upon mountains of corpses.