A gigantic column of mist appeared without warning in a corner of Antarctica. This was the hyperspace "Passageway" created by the alien "JAM" for the invasion of Earth. Earth's defense created the Fairy Air and established outposts for the sole purpose of pushing JAM back to the Planet Fairy on the other side of "Passageway." The war between mankind and JAM has been ongoing for more than thirty years, but the end is not yet in sight.
Rei Fukai is a young man who trusts his advanced armed tactical reconnaissance plane, Yukikaze, more than he does his fellow man. He comes into contact with JAM while gathering military data on board his beloved aircraft. JAM, showing interest in Rei and Yukikaze, wages fierce battles against mankind with every means conceivable. What is the purpose of this war? Before long, JAM begins to launch an all-out attack upon the Fairy Air .