Riding on the Galaxy Express heading for her home, Maetel is joined by a young boy named Nazca, who seeks revenge for his sister. On arrival, he immediately gets caught up in the fight between the robotic forces of Queen Promethium and the human beings on the planet that is slowly facing another ice age -- which, naturally, spells bad news for the human beings on the planet. (Prequel to famous Galaxy Express 999 series)