F.P.1 Doesn't Answer

Urged by famous airman Ellissen the Lennartz Company puts into reality the project proposed by his friend Droste: F.P.1, a huge floating platform in the Atlantic that makes long-distance flights viable. Ellissen is in love with company heiress Claire, but when he returns from his adventures to save the endangered F.P.1 he finds out that he has lost her to Droste.