Adieu Galaxy Express 999

Tetsuro Hoshino was once a boy willing to give anything to board the Three-Nine, including a promise to accompany a mysterious woman named Maetel to the other side of the Galaxy, if only to fulfill a vow to avenge the cruel death of his mother at the hands of the villainess Count Mecha.
Now, two years after the events of Galaxy Express 999, Earth has become a battlefield, and Tetsuro is summoned to board the Three-Nine once more. In this, the shattering full-length theatrical conclusion to creator Leiji Matsumoto's epic story, all questions will be answered and all mysteries revealed as Tetsuro embarks on a journey the destination of which is unknown even to Galaxy Express Railways locomotive C6248 itself... a journey which will reveal a secret so awful, even Maetel herself can hardly bear to speak of it. (official distributor synopsis)