Penniless Lord Whitebait's plan to save his sinking fortunes is to open stately Whitebait Manor to the public. But the public ignores his gesture, and his fortunes fade even further, with a stream of debts threatening to run into a deluge when his daughter's fiancé demands a plush and costly wedding. Where is the cash to come from? Whitebait and his servant Spankforth's answer is a scam involving the theft of a valuable painting from the Manor. How could such a cunningly original ruse fail?

An American art student in England falls in love with a beautiful Englishwoman. It turns out that she's a nudist, and in spite of his misgivings, he decides to join her at her nudist camp.

The film follows Jack Hopkins, an aircraft designer with a passion for traction engines. His boss is eager to sell a new supersonic jet plane that Jack has designed to American millionaire Paul Fisher. The first encounter between Fisher and Jack goes badly, and tensions only heighten after Fisher's daughter Kathy damages Jack's prize traction engine "The Iron Maiden", rendering it impossible to drive solo. Jack is desperate to enter the annual Woburn Abbey steam rally with the machine, but his fireman is injured and unable to participate. When all seems lost the millionaire himself is won over by Jack's plight and joins him in driving the engine; the two soon become firm friends.