When colleagues think she's an espionage agent, a Girl Friday at a top-secret aeronautics think-tank chaotically sets out to clear her name.

Returning World War I soldier MacRae and fiancee Day readjusting to life in the heartland; he wants to postpone their marriage until he is financially secure, and the waiting causes some misunderstandings.

The State Department wants Ethel Barrymore to represent the American theater at an arts exposition in Paris, but a beleaguered bureaucrat mismails Miss Barrymore's invitation to Miss Ethel "Dynamite" Jackson. She's a very blonde, very brassy chorus girl, who proves to be dynamite on the New York to Paris ocean crossing.

Wealthy stage-struck Nan Carter strikes a bet that she can say "no" to everything for 48 hours. If she wins, she gets the $25,000 she needs to back a Broadway musical vehicle for herself. She's determined, even if it means saying "no" when the fellow she loves pops the question.