Gamilons are a race of evil aliens that are trying to destroy the planet Earth. However, a group of civilians look to the battleship Yamato for its space travel and go on a mission to bring back a neutralizer that will get rid of the radiation from the Earth.

In the distant future, the war between the human race and the Gamilon has taken its toll on the planet Earth. Constant bombardment of radioactive asteroids has rendered the planet's atmosphere uninhabitable. As a means of relief aid, Queen Starsha of the planet Iscandar offers the Earth Forces a device that can completely neutalize the radiation off the planet. For this task, the space battleship Yamato is launched from the remains of its World War II ancestor on a 148,000 light-year journey. However, the crew of the Yamato has only one Earth year to travel to Iscandar and back, or the human race will come to an end.—crevallejack