A stranded train becomes a haunted tomb. Time itself is breaking, and the only people who can fix it are a ten-year-old kid and three adults he just met. The show treats this collision between childhood innocence and cosmic horror as tragedy, not spectacle, letting the quiet moments between rescues do more damage than any explosion could.
A luxury space train crashes on an isolated world, stranding its passengers in a race against catastrophe. The Conductor, Maetel, and young Tetsuro find themselves trapped on a planet caught in a temporal loop, where reality itself fractures and reforms endlessly. A rift in spacetime called the Herise Time Mystery devours everything in its path, and the countdown to destruction continues relentlessly. The SDF Sirius Platoon springs into action, navigating treacherous terrain and the planet's unstable environment to reach the crash site. What begins as a straightforward rescue mission becomes a desperate struggle against forces beyond conventional understanding. Time works differently here. The laws of physics bend and twist. Every decision carries weight when seconds might stretch into hours or vanish entirely. Tetsuro's innocence contrasts sharply with the grim reality around him, grounding the story in human emotion even as cosmic horror unfolds. The crew must solve the mystery of the planet itself to escape, piecing together fragments of history and time while the rift consumes everything closer.