In this world, everyone seeked power and fame except Zion, a young seventeen years old boy who lived in the village with his blind father. He had always wanted to stay away from the world and its hassles, living a quiet and fulfilled life with the only person that mattered the world to him but what happens when trouble come finding him?! -------- As many vicious monsters roamed freely in Eridoria, hunting and killing humans mercilessly, it is the duty of the beast slayer organization to see that these beasts are either tamed or annihilated. Zion finally joins the organization with the objective of finding the beast that killed his father and exert vengeance on it but what happens when his destiny doesn't end there? what happens when he finds out that he has a more heavier task ahead of him? What happens when a beast slayer suddenly becomes a human monster? And what happens when he's got a full house of beasts? Let's follow Zion in his adventure as he becomes the first legendary beast slayer as well as the father of beast clan.