Early in the year of 1979, Japan's most famed rocketship, the JX-1 Hawk, with its crew of 30 men, was launched from the Interstellar Exploration Agency’s rocket launch site at Mt Fuji into space on a 9-month journey to investigate the planet Saturn. After a 9 months journey to Saturn, the crew are given a new directive for the mission from Earth. It was discovered that a small, runaway "planet," which some scientists believed to be the solid mega-dense core of a collapsed star that had somehow run amok. It is subsequently given the name "Gorath" by the international scientific community, had entered Earth's solar system.
Upon encountering Gorath and attempting to investigate its rapid movement in the solar system, they discover that Gorath is smaller than Earth but with 6000 times Earth's gravity. The JX-1 is caught in its gravity well and its entire crew of the spacecraft lose their lives as the enormous gravity well of the approaching celestial body destroyed the ship.
Back on Earth during the Christmas season, the transmitted data made its way back to Earth.
Later at the United Nations, a gathering of Earth’s top scientists resolved to this all-important goal by pooling together large amounts of technical advancements they made in the past two decades. After much debriefing, the scientific community unvaild their plan to save the Earth. They dub the plan the South Pole Operation. The South Pole operation base is to be designed to house a large international team of engineers and scientists. The plan involves the construction of huge rocket thruster engines, 500 meters below the surface and in an area 600 kilometers in diameter, producing an atomic force equal to that of 6,600,000,000 megatons. When completed and activated, these mega-thrusters would serve to literally move the Earth more than 400,000 kilometers out of its orbit in 100 days until it was safely out of range of both the approaching star Gorath and its devastating gravity well, and then move the Earth back into its proper orbit once the danger had completely passed.
Construction on the massive South Pole base is put into action as ships and helicopters from many nations bring in building material necessary to the plan. In addition, powerful mobile heat-generating devices known as atomic burrowers were quickly cobbled together to assist in the project of creating the caverns in the icy terrain of the Antarctic that would be needed to house the booster rockets.
Meanwhile, in deep space, the JX-2 Eagle succeeds in its mission. The data they acquired, including the disturbing fact that Gorath was continuously adding to its mass by absorbing more space debris in the path of its gravity well. This information was sent to the U.N. personnel on the three space stations SSS-1, Terra and Delta.
Meanwhile, in space, With this news, the JX-2 Eagle is ordered to return to its base on Earth, along with the three-space stations (all of which were moved from orbit to avoid having the multibillion-dollar constructs being struck by Gorath when it approached the Earth).
After the critical moment passed, the full global cooperation of every nation on the planet succeeded marvelously and Earth was moved out of Gorath's path, and then successfully actuated back into its normal orbit, thus saving the planet from destruction.
- Ryo Ikebe as Dr. Tazawa
- Yumi Shirakawa as Kiyo Sonoda
- Takashi Shimura as Keisuke Sonoda
- Kumi Mizuno as Ari Sonoda
- Ken Uehara as Dr. Konno
- Akira Kubo as Cadet Astroanut Tatsuo Kanai
- Akihiko Hirata as Spaceshop Otori [J-X Eagle] Captain Endo
Gorath was released theatrically in Japan on 21 March 1962 where it was distributed by Toho. It was released in the United States as Gorath by Brenco Pictures through Allied Artists Pictures with an English-language dub on 15 May 1964. The film was double-billed in the United States with The Human Vapor.