Sang-ho and Sun-ja are kidnapped by someone and live in brutal abuse while performing acrobatics in a circus troupe called the "77th Dan". One day their uncle comes to visit them and they try to escape, but when Sun-ja is captured by the circus, a black hooded person suddenly appears to help them.
Dr. Samson, inventor of the Hyper Travelling system, has disappeared along with his invention during an experiment on the planet Leo, and it looks like the work of the Zoic Empire. The Earth Defence Force sends Superior Falcon 7 to rescue the scientist and save the Universe from certain catastrophe. There is no silver lining in the race, only the winner survives.
Siporta, the space conqueror, has captured the only being in the universe that can stop him: the Canon Robot. Unable to control it, he decides to melt it down and use the parts to create his own combat robot. Now the people of Earth are in a race against time to save the Canon Robot from destruction so that they can use it to defeat the otherwise invulnerable Siporta.
