In the futuristic year of 2015 A.D., the Director of the Ministry of Science, Dr. Yamanoue, teams up with robotics expert Dr. Kawashimo in order to create the greatest robot in the world: Jetter Mars!

There's just one problem... Dr. Yamanoue and Dr. Kawashimo have two very different ideas of what makes the greatest robot in the world. Dr. Yamanoue thinks that strength and power will dictate which robot is the greatest, while Dr, Kawashimo believes in kindness and helping others. Jetter Mars struggles with these two sides of himself, and must find a balance in order to truly become the greatest robot in the world!