For 12 years, Woo-jin suffered from an unidentifiable nightmare tormenting him without end. Then, a sudden death arrives — and when he opens his eyes, he finds himself in none other than the world of that very nightmare: the “Demon Realm.” Drawing on the skills he has honed over the years, Woo-jin hunts demon beasts and grows stronger with each kill, beginning a new life as a demon beast hunter. A dark fantasy world where the more you hunt, the stronger you get? Actually, this is perfect.