A planet called Telezart comes under attack by a race known as the Gatlantis, who wish to conquer the world and use its power for their own gain. Meanwhile, Earth and Garmillas, now allies after their ten year war, fight side by side to retake a world lost. The Yamato crew are angered by the revelation of the Andromeda class battleship. The crew receive a vision from a planet called Telezart, calling for their aid.