A secretary becomes so valuable to her boss that it jeopardizes his marriage.

On their third anniversary, New York magazine publisher Van Stanhope and his wife Linda are still very much in love. Van's mother Mimi, however, feels that his secretary, Helen "Whitey" Wilson, is too attractive not to be a temptation to Van. Linda trusts him and refuses to give in to jealousy, even when some of her friends express the same opinion as Mimi. Van and Whitey's relationship is strictly business, but his dependence on her, and her devotion to him, is a source of displeasure for her fiancé Joe, who wants her to give notice and marry him. She refuses and becomes even more involved with work, helping Van to develop a secret deal to buy a "five cent" weekly from tycoon J. D. Underwood. Because Van is afraid that Hanson House, a rival publishing concern, will ruin his deal, he and Whitey have to be very secretive, even from Linda. At an ice skating party for Stanhope Publications, Linda's jealousy is aroused by a catty remark by one of the executive wives, and she asks Van to transfer Whitey. They quarrel over her jealousy, but make up that night. A short time later, when Van has to go to an advertising convention in Havana, he won't let Linda accompany him because he needs to corner Underwood to close the deal. He later has to summon Whitey to join him, and they work round the clock to finish the needed paperwork for the offer to Underwood. When the deal is closed, they celebrate and for a moment are strongly attracted to each other, but nothing happens. Linda calls a few moments later, however, and when Whitey answers the telephone, she assumes the worst. When Van returns to New York, Linda refuses to listen to him and begins divorce proceedings. Van tries to get her back, but gives up and invites Whitey to sail with him for Bermuda. She has fallen in love with him, but realizing that his happiness is with his wife, she goes to Linda, who is about to sail for Europe, and tells her what a fool she would be to give her husband up. Linda then goes back to Van, and as Whitey leaves the office, she is met by Joe.