As the threat of Napoleonic invasion looms ever closer, a German duke and potential ally of England falls for a pretty ballerina.

Insurance agent-physician collects on policies of men murdered by a disfigured resident of the home for the blind where he acts as doctor-on-call.

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…