Tetsuro boards the Galaxy Express 999, a legendary starship that carries travelers across the cosmos toward a distant mechanical paradise. He's searching for a way to transform his body into immortal machinery, hoping to escape the poverty and hardship that plague his human existence. Aboard the train, he meets Maetel, a mysterious woman with her own enigmatic reasons for traveling the stars, and together they journey through alien worlds and encounter strangers with their own desperate dreams of transcendence. The 999 becomes more than a means of transportation: it's a vessel collecting broken people seeking redemption or escape. As Tetsuro moves closer to his goal, he begins questioning whether the promise of eternal mechanical life actually offers what he truly needs. The series balances intimate character moments with a sweeping sense of cosmic wonder, creating space for reflection amid the spectacle. This is science fiction grounded in longing. It speaks to anyone who's felt trapped by circumstance and wondered if reinvention could save them, while questioning what parts of ourselves deserve saving in the first place.