Since Khan was born, the Dark King had butchered humanity into the blink of extinction.

Khan was raised for the sole purpose of destroying the Dark King. He became the most powerful being and the hope of humanity, but in the final battle he lost his life.

After death he was given another chance at destroying a being known as the Demon Lord, who is the equivalent of the Dark King, but in a new world filled with magic.

Will Khan save humanity or let them die in this new world?