Lucy is preparing to go on vacation, but she has a change of heart when her substitute secretary turns out to be an attractive blonde who Mr. Mooney really likes. Lucy secretly doesn't go on vacation, and spies on them in various disguises.

Mr. Cheever warns Mr. Mooney that his job is in jeopardy unless he attracts new business to their branch of the bank. So when Lucy hears that a recording star, country hick Homer Higgins (Ernie Ford), is about to become a California resident, she sets off to the hotel to coax him into setting up an account with their bank. To impress Mr. Higgins and his family, Lucy and Mr. Mooney set up a hoe-down in the bank after it closes that evening...and Lucy decides to dress down to pose as Mrs. Mooney.

Whe famous French movie star Jacques DuPre expresses interest in opening an account at Mr. Mooney's bank, Lucy is asked to visit his apartment and dictate a formal letter of agreement confirming the account. While visiting, she drinks a little too much champagne and makes a complete fool of herself. But Monsieur DuPre gets a kick out of it, and gets the account anyway.