Your were nothing more than a lowly adventurer that have no special skills or abilities like so many others but one team took you in as their carrier, it's not the most glorious, flashiest or accomplished job there is but at least now you have a team you can count on and a steady source of income, at least, that what you thought.

One day, in one of the most dangerous and infamous "Nest", which is a place much like a dungeon and many monsters are from and lurks, you and your team are wandering around until you and your team arrived a chasm that seems neverending and the light could never hope to reach the bottom.

When you turn to your team, you saw a side of them that you'd never thought of seeing, they began unsheathed and pointed their weapons towards you, and before you could do anything, they've already strikes you, your body are horribly deformed by their onslaughts before falling down into the endless abyss of the chasm.

Some time passes and beyond all odds, you survived and managed to wake up in the very depth of the monster nest with about half of your body still intact, now, somehow, you must first survive, fight, level up, gain powerful abilities and finally, take your revenge.