The end of the world has come. Those who survived it are forced to coexist with the Zones - places from which constant danger emanates. But among the people there appeared those who are related to the zone, those who have special skills, healers, witches, swordsmen and, finally, Knights - warriors accompanied by familiars. Traveling along the borders of the Zone, the Knights enter into battle with its Spawns. One fine day, Knight Victoria, the former Valkyrie Princess, felt the Call and went after him.