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The world is in a technological boom. An exhibition opens in Japan celebrating the robotic achievements of the world. Massive Robots from around the world are showcased and displayed for all to see. Suddenly and without a warning, a mysterious army appears and steals all the robots. This army is under the command of President Devilar and mysterious despot who leads an evil faction called the Tetsumen Tou (Steel Mask Party). Their mission is the total conquest of earth through use of robots.

To this end President Devilar has also kidnapped various scientists to assist him in the “modifications” of these robots. One of those scientists being targeted is the brilliant Kurenai Kenichiro.

Kenichiro has been working on a secret project to build the most power robot the world has ever seen, here to named Red Baron. He entrusts this secret to only one person, his younger brother Ken, who just so happens to be a member of the elite special forces unit known as SSI (Super Science Institute).

Kenichiro is kidnapped by Tetsumen Tou and has a bomb implanted into his chest. They force him into revealing the location of Red Baron. Before Tetsumen Tou is able to steal Red Baron, Ken activates the robot and uses it to battle the Tetsumen Tou agents and their monster mecha Troy Horse. For his betrayal, President Devilar detonates the bomb impeded in Kenichiro and kills him before the horrified eyes of Ken.