After the untimely destruction of America's rampaging I.S, the Gospel, the nation lost all privileges to own Infinite Stratos tech. It's new project, Exeter, carries the dream of a new breed of aerial ingenuity, and with it, the mission to become ruler of the skies for the USA. Only two things stand in the way of this dream; the I.S. Academy, and the heart of Exeter's own pilot.