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F. P. 1 refers to "Floating Platform 1," a huge landing platform and refueling station being built in the middle of the Atlantic by a group of forward-looking industrialists and engineers. But some people -- especially the shipping companies -- see F. P. 1 as a mortal threat to their financial well-being, and will stop at nothing, including sabotage and murder, to destroy it. Caught in the middle of these machinations -- and a romantic triangle that must be sorted out -- are Major Ellisen (Conrad Veidt), a suave aviator/adventurer; Claire Lennartz (Jill Esmond), a co-owner of the company building F. P. 1; and Captain Droste (Leslie Fenton), the designer and commander of the installation. Their personal conflicts are closely interwoven with the suspense, as industrial espionage rears its head along with attempts to wreck F. P. 1, endangering everyone aboard. F. P. 1 was filmed simultaneously with German and French casts as well -- all directed by Karl Hartl, with Hans Albers as the lead in the German version, and Charles Boyer in the French version -- on the same sets, and released in those countries as F.P.1 antwortet nicht (1932) and I.F.1 ne répond plus (1933).