In an era marked by turmoil, Earth has transformed dramatically, now overrun by an insect-like species known as the Blue. Yuji Kaido, afflicted with an enigmatic illness, is placed in cryogenic sleep until a remedy can be discovered. Upon awakening, Yuji realizes that over two decades have passed, and these creatures now dominate the planet. He allies with a band of soldiers armed with advanced mechas, striving to combat the Blue and restore hope for a brighter tomorrow.