A young man named Bang Ho-young, who used to grind for rewards in a game, suddenly finds himself transmigrated into that very world.
After offending the queen, he is appointed as the Frontier Lord (“Border Count”).
The fief he receives is nothing but a desolate wasteland in ruins, constantly invaded by monsters.
The only thing he can rely on is his skill [Conversion], which allows him to tame monsters.
By turning enemies into allies, he begins developing and defending his territory!