During his wife's absence, Andrew Dorsey is snared by Vivian Hepburn, owner of a crooked gambling house, and her silent partner, Guy Tarlow. Dorsey loses so much money that Vivian persuades him to give her one of his firm's checks for a large sum of money. Hearing her husband's confession, Marion Dorsey, returned from Europe, determines to retrieve the check.

Zaza is an actress and the favorite at an open-air theater in a small French town. When diplomat Bernard Dufresne comes to the village, he stays away for fear he will fall for her. But during one performance, while Zaza is singing on a swing, her rival cuts the rope and she falls. Zaza is badly injured and she makes Dufresne's acquaintance. A romance quickly springs up and he installs her in a villa. Their happiness is marred, however, when his wife appears.

Hector Colbert sues his wife Marjorie for a divorce after Peters, an admirer of Marjorie, deliberately compromises her. Colbert's lawyer, Daniel Farr, believing that Marjorie's behavior was wrong, gets the divorce, but he ruins the reputation of a fun-loving woman who was simply bored with her husband. Later, she and Farr meet; she plots a revenge against the lawyer but confesses her fabrication when she realizes that she loves him.

The Duke of Chartres is in love with Princess Henriette, but she seemingly wants nothing to do with him. Eventually he grows tired of her insults and flees to England when Louis XV insists that the two marry. He goes undercover as Monsieur Beaucaire, the barber of the French Ambassador, and finds that he enjoys the freedom of a commoner’s life. After catching the Duke of Winterset cheating at cards, he forces him to introduce him as a nobleman to Lady Mary, with whom he has become infatuated. When Lady Mary is led to believe that the Duke of Chartres is merely a barber she loses interest in him. She eventually learns that he is a nobleman after all and tries to win him back, but the Duke of Chartres opts to return to France and Princess Henriette who now returns his affection.

When gangster Jimmy Donovan is made guardian of Midge, the 7-year-old brother of his friend Big Ben Murray, he decides to reform and rear Midge properly. The court takes custody of Midge, but Donovan proves himself by recovering a payroll stolen by some of his ex-colleagues, thereby winning Midge and Kitty, his girl.

Hector, who was reared by a maiden aunt, decides to leave his sheltered life and become a reporter. At the newspaper where he has works, Hector becomes friendly with a young female reporter, who uses the byline "Firefly" for a series of articles intended to expose a notorious café. At the same time, Hector's aunt, head of the local Purity League, gives a stirring speech to the membership about ridding their community of the café. The young woman enlists Hector's aid and together they gain enough evidence to close the café.