The Firefox is a high tech fighter plane built by the Soviet Union. It's faster than any other fighter plane, and is undetectable to radar, and has a new weapon control system that is thought controlled. When the West learns of it, they decide that it's necessary to get it before it could be mass produced. They need a pilot, and the best and probably only man for the job is Mitchell Gant, a former Air Force pilot, who is now retired. They convince him to do it, even though the chance of his success, is very slim. He begins by pretending to be a man, whom the Soviet police is investigating, when he goes to meet his contacts which includes the man he is impersonating, he is killed. The sight of his death brings about one of Gant's delayed stress attacks, but he gets away. With help from the underground, he is brought to where the plane is. Though he manages to get it, the Soviets mount an offensive to find him, which includes another version of the Firefox, which might catch up with him.