Wandering through the desert, lanky swordsman Van is armed with a sash that straightens out into a sword. Heâ€™s on a quest for vengeance against a mysterious clawed man who murdered his bride. On his journey, he picks a traveling girl named Wendy whom Van rescues from bandits by summoning a mecha with his sword. Wendy is on a quest to find her missing brother, whose only reference is an engraved gun she carries on her back. In their travels, they encounter more bandits and other foes including a mysterious woman named Carmen99, who may have a connection to both Van and Wendyâ€™s quest.