The year is 2205. Dessler, in search of a place for the Garmillas people to emigrate to, arrives at a planet named "Galman". Meanwhile, on Earth, the 65th Escort Squadron is born, with the Space Battleship Yamato as its flagship. Among the young crew members who spend their days training before departure, there is a young man, Domon Ryusuke, who turns a steely gaze toward the Yamato.