Kim Jun-Woo is the world's first SSS-ranked genius hunter.
He is someone with incredible abilities, but his terrible personality leads to issues with his reputation.
Amidst trouble, he is attacked and killed by a mysterious group.
And when he opens his eyes, he finds himself back in the past, 10 years ago.
Despite his efforts to become a hunter once again and elevate his rank, his skills are all sealed by the karma of his previous life.
To have that released, he needs to become the 'Cleaner of the Dark Dungeon,' famously known to be extremely demanding in the industry?!
But this cleaner is different!
Not only monsters but also troublesome hunters, superiors only take positions after being hired for family reasons, and even those who will be his colleagues.
He's creating chaos to clean up everything.
Old hunters, stronger than current ones, and his crazy cleanup begins!
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