In the tense atmosphere preceding World War II millionaire Howard Hughes develops the invention of the century: a high-powered mini jet-pack. Nazi agents steal a prototype of the device but lose it on an isolated airstrip during a frantic chase by feds. Aspiring pilot Cliff Secord accidentally finds the pack and soon he s zooming through the air spinning flipping and crashing into the occasional barn. But when Cliff uses it to rescue an unconscious pilot plummeting to his death the press dubs him the rocketeer and Nazis are hot on his trail. Errol Flynnesque actor and Nazi agent Neville Sinclair hires gangsters to go after him. Devious Sinclair will stop at nothing to secure the invention for the fascists including kidnapping Cliff s girlfriend Jenny. With flair and courage Cliff dons his rocketeer outfit and saves the free world from the encroaching Nazi menace.