A long time ago... There were Ancient Heroes in part of a guild known as Sword of Logos, the defender of the World. They use the power of books known as Wonder Ride Books. 11 years later, the enemy known as Megiddo was coming alongside Kamen Rider Calibur the traitor. Little does everyone know a destructive craving Swordsman was released from his seal and is now ready to turn the world into a giant void.