Across the desolate wilderness, resources are scant and survival is the utmost priority. Essential supplies are delivered through the network of zeppelins, relying on protection from mercenary crews piloting single-engine fighter planes. At odds with pirates and political conflict, these brave aviators provide the strongest guard to stability in such dismal lands.Kylie—a talented, hotshot pilot—serves with one such crew: the Kotobuki Squadron. Recruited to the group by her childhood friend Emma, her natural aptitude for flight makes her a key member. Armed with their Hayabusa fighter planes, the six-member squadron is hired to protect people, goods, and society as they continue to engage hardships in their complex world.