The year 2205 AD—The people of Gamilas, having left their dying home planet, began their migration to the new world, Planet Garmillas. However, before even half of the transfer was completed, Planet Gamilas was attacked by an enemy of unknown origin and tragically destroyed. The mysterious enemy—Desarium, leading a massive dark fleet—aims to seize and tow away the twin planet Iscandar, which was knocked off its orbit by the shockwave. To rescue the remaining hundred thousand or so Gamilans and Queen Stasha, who remains on Iscandar, Dessler joins forces with his former nemesis, the Space Battleship Yamato, to challenge Desarium. Yet, they were unaware. What awaited them ahead was neither victory nor defeat, but a confrontation with a cruel truth...