Wall Street wizard, Larry Day, new to the ways of love, is coached by his valet. He follows Vivian Benton on an ocean liner, where cocktails, laced with a "love potion," work their magic. He then loses his fortune in the market crash and feels he has also lost his girl...

In the same hotel, two parties are being held, one a farewell for wealthy society woman Vivian Benton, an amateur aviatrix, and her show, Aero Girls of America, and the other a recognition dinner for successful stockbroker Larry Day. Day is very inexperienced in love, so Vivian bets Day's assistant, Jimmy Carrington, that she can get a date with him before her ship sails the following evening. Vivian successfully makes the date, but as Day is getting romantic advice from his valet, Roger, she calls him from the ship to break the date, amusing herself at his expense. Vivian is traveling to England with her fiancé, Parkington Chempson, to open her show. Determined to get even, Day and Roger board the same ship, and Day spends the voyage unsuccessfully wooing Vivian, falling in love with her in spite of himself. While Day concentrates on Vivian, his financial situation deteriorates until the stock market crash reduces him to bankruptcy. The last night on board ship, Day declares his love for Vivian. Members of her troop eavesdrop on their conversation, and when their presence is discovered, Day believes that this is another one of Vivian's jokes. At the dock at Northampton, however, Vivian tells Day that she loves him, too, and even the fact that he is broke will not deter her from marrying him.