Super Science Institute member Ken Kurenai pilots the giant robot Red Baron, entrusted to him by its inventor, his older brother, to avenge his murder at the hands of the Iron Mask Party, led by the evil President Deviler.
Anti-hero Gentaro and his sidekick Goro (who has the ability to transform into the Iron King) must do battle against against various threats including a vengeful ancient clan, phantom terrorists, and invading extraterrestrials.
After scientist Professor Kasuga is killed by fiendish aliens for plans to a super-rocketship, his children trek across Japan, protected by the second-oldest brother, Koji, who transforms into the super-cyborg, Silver Mask.
With the help of scientists, a talking robot parrot, and benevolent aliens secretly disguised as his deceased parents, young Hikaru Azuma fights assorted alien threats as the flying, exo-suited Lightspeed Esper.
