在这部银河铁道999：永远的幻想科幻/动画片中,人类文明进入动乱的时代，地球笼罩在战火之下，各大主要城市相继沦陷，人类四散而逃，血流成河。虽然星野铁郎（野沢雅子 配音）破坏了机械化星球，但是机器人与人类的战争仍在继续，并且人类已经到了生死存亡的危急时刻。正值紧要关头，铁郎得到来自梅蒂尔（池田昌子 配音）的信息，要他重新搭乘银河铁道999号。在一众战友的帮助下，铁郎穿过一道道火线，经过几番周折，终于登上了久违的银河铁道999号，重新开始了一段漫长、孤独而又充满惊险的宇宙旅程……
本片为《银河铁道999》第三部剧场版动画。
A few years after the events of Adieu, Galaxy Express 999, Tetsuro and his motherly companion Maetel, tried to get rid of the evil Mechanized Empire, but now that Tetsuro is back on planet Earth, and is getting beaten up by cruel rulers, who overtook after the machines gotten destroyed. Maetel sweeps him away yet again.
