Sho Zama, an up and coming motorcycle racer, has been whisked away to the world between shore and sea, Byston Well. The world of Byston Well closely resembles medieval Europe with one exception: it contains giant robots called aura battlers. Brought to this world by the power hungry Drake Luft because he possesses the rare gift of aura, Sho is forced to fight in a war between two warring nations as an aura battler pilot. Can Sho find a way home, and what of the continually-expanding conflict?