Jōjirō Okami

A floating amorphous life-form descends from the atmosphere to consume carbon in the form of diamonds.

In 1976, a drifting star named Gorath is discovered to be on a collision course with Earth. Although it is smaller than Earth, its enormous mass is enough to destroy the planet totally. A mission sent to observe Gorath is destroyed after the ship is drawn into the star, with a later mission barely escaping the same fate. However, Astronaut Tatsuma Kanai is left in a catatonic state due to his near death experience. Unable to destroy the invading star, Earth's scientists undertake a desperate plan to build giant rockets at the South Pole to move the planet out of Gorath's path before it is too late.

In 1965, the space station JSS-3 is destroyed by a fleet of UFOs, which then begin a global siege on Earth, using rays to manipulate gravity and control the minds of men. In response, a global council meeting is held to determine the source of the attacks and prepare a rocket ship armada for a counter-attack, a true battle in outer space. . . The film is a sequel of sorts to Toho's THE MYSTERIANS in the reprise of the Etsuko Shiraishi character of that film as its heroine. It was edited to 74 minutes for its American release.

In Japan, scientifically advanced invaders from the war-destroyed planet Mysteroid cause an entire village to vanish, then send a giant robot out to storm the city by night, after which they request a small patch of land on Earth and the right to marry earthling women, claiming to be pacifists. Mankind must decide whether to capitulate or to resist.