Soviet fighter pilot Hepburn defects to the West when she's passed over for promotion. Hotshot USAF pilot Hope is assigned to thaw her out, with romantic results. Basically a remake of Ninotchka, and also very similar to Jet Pilot, an awful film that was actually made six years previously but not released until this was unleashed on the public.
Much maligned, long supressed film is actually not bad. It's not really because of the leads; Hope and Hepburn aren't really credible characters, and the latter's Russian accent has been memorably described as "Maria Ouspenskaya on meth." It's more because of the supporting cast of familar British faces. Helpmann, especially, is great as the lovelorn sad sack Kropotkin. Memorable bits by Alexander Gauge (as a southern American senator, of all things) and Richard Wattis as a lingerie salesman, among others, are what keep the film going.