Two years following the events of Galaxy Express 999, Earth is engulfed in conflict, prompting Tetsuro to return to the Three-Nine. In this gripping conclusion to Leiji Matsumoto's saga, Tetsuro's voyage promises to unveil long-held secrets and resolve lingering mysteries. As he delves deeper into his quest, he uncovers a harrowing truth that even Maetel finds nearly unbearable to confront. The emotional and dramatic journey culminates in revelations that will redefine their destinies and the universe they inhabit.