An American military officer and his wife move to a cottage in what they think is the peaceful English countryside, only to discover the area is a hotbed of spies and secret agents.

In need of cash, Roger Cavendish and his valet take a job escorting the perfect woman for a night on the town. She is in fact the robotic creation of Professor Belman, but it turns out rather to be the Professor's niece Penelope doing a pretty good imitation of the perfect Olga who winds up with them in the bridal suite at the Hotel Splendide.

In a Swiss Alpine resort shortly after the War an army officer and upper-class Humpy Miller both set their sights on Mary, the landlord's daughter. When the two come down with chicken pox they are put in the charge of fellow guest Miss Cartwright, who turns out to be Humpy's old nanny. The two Englishmen unite not only against her tyranny but against a dense Greek who is also after Mary.