This isn't a show about saving the world from aliens or war. It's about ordinary teenagers learning to live in the wreckage of one, and that changes everything. The space stations feel lived-in because the characters treat them that way, Shima isn't special, she's just determined, and watching her actually earn her place among peers who matter makes you believe the stakes again. By the midpoint you stop thinking about the plot and start caring whether these specific people survive the next catastrophe, which is exactly when the show stops trying so hard and starts breaking you instead.

In 2356, nearly two centuries after radiation from an exploding star killed vast numbers of people on Earth, humanity is rebuilding and bracing for a second wave from the same supernova. Giant stations called foundations, spread across the Solar System, serve as hubs of learning and exploration. Shima Katase defies her mother and enrolls as a preparatory student at Stellvia, hoping to see space firsthand. There she trains as a pilot, aiming to join the Great Mission meant to shield Earth from the coming wave. Between difficult piloting classes and a turbulent social life, she gradually grows into someone who might help protect humanity. The series mixes mecha action and romance with science fiction stakes.