In a land far away, there is a legend that an Iron Clad Savior shall bestow upon the land and save its people from grief, abuse and evil. An armored suit-wearing woman with amnesia, only known as "Iron Girl", fights against a group of outlaws called "Crazy Dogs" to save a small village in the wasteland. Is she the legendary "Iron Savior" written in the old document of the village?

Set in the near future in a lawless world. Kurisu Saotome (Kirara Asuka) is a beautiful woman, but she is also a deadly bounty hunter. She wears an armored suit, possessing great power, and she is known as Iron Girl. Kurisu Saotome doesn't remember who she really is or where she comes from. To regain her memory, she continues her lonely battle.

In 20XX, Japan is full of Cyborgs. Human developed Artificial Intelligence JUDA to protect the Earth. However, JUDA started to attack humans since humans were planning a nuclear war and they are the real enemy of Earth. The fight between Human and Cyborgs flattened Japan. A military company started developing a secret weapon. Before its completion, the weapon was stolen. If the weapon is completed, there would be a final war. Vigilante “Resistance” sensed the danger and stood up. Meanwhile, people were turned into a Murder Weapon after their death. Those cyborgs include Chris had lost their memories. One day Chris has a fateful meeting with a mysterious girl Sara. However the mysterious girl Sara was the final weapon SARA.