FireFox (1982) (Theatrical Version)

(Synopsis translated from the Russian website KinoFlux)

Like a hell of a bat, it sweeps through the sky at six times the speed of sound. Like a flickering ghost, it remains invisible to the most sensitive radars. Like a deadly poisonous cobra, it hits the enemy with its pinpoint missiles.

It is the MIG-31 fighter: the deadliest weapon ever created by man. This top-secret plane was made in the USSR and received the code name "Fire Fox".

To prevent the balance of power during the Cold War from being upset and our compatriots from gaining an advantage, the Americans decide to steal this miracle of technology.