He lived his whole life as a dog of the Sacheondang family.
But that word was nothing more than being useful until cooked and discarded.
In a life of cruel fate, Un-hyeok made a vow.
If the world had abandoned him, then he would abandon the world in return.

“If you’re going to kill me, kill me properly.”
“…….”
“If not, I’ll crawl up from the very bottom of hell and shove poison into your mouths.”

Clang—!
It should have ended like that.
Yet Un-hyeok opened his eyes again.
And he had come back as the madman of the Poison-Demon clan — the very clan he had destroyed!

“Central Plains, tremble in terror.”

I am the nightmare that lasts ten thousand years,
the demon that will be remembered forever as the greatest of all ages.
The Absolute Poison Demon.