This world is called Horodyn, so named for its first king. At the edge of a village surrounded by a huge forest lies the powerful stone Arcana, the source of all order in the world. It is said that only one with power can acquire Arcana. Slayers annihilate hordes of monsters, so that they could lay their hands on Arcana. What power does it hold within? And to what destiny is one with Arcana bound?