Hunters are people that was chosen by the king himself to eliminate the unwanted, such as monsters, witches and humans as well. It was a dangerous job, so to avoid riot and refusal, the kingdom had been choosing orphans as the most common hunters. There were other advantages from having orphans as an army, they're cheap, there are many of them and they don't have much to lose. This is a story about a shadow war, where the sacrificed fought for freedom.