As all good things do, this anime begins with a supernova shockwave frying half the globe in 2167.
Two hundred years later, and with the power of science, humanity survived that, and now has A Great Mission: Don’t Be Cooked by Particle Shockwave/other incoming aftereffects. Events happen on a Great Particle Umbrella In The Sky, Stellvia Foundation, part, well, particle umbrella, part university for best and brightest, part research station and part interceptor base for dealing with possible incoming planetary fragments. It’s a tale of growing up, becoming your best self, recognizing what horrible jealous nincompoop you have been, and going into the future with head held high.