Wealthy J. Thomas “Tommy” Van Buren is as famous for drinking and womanizing as his skillful polo playing. After a night of carousing, Tommy is relieved when his normally reproachful father congratulates him on being selected for the American team in a cup match with Britain. That afternoon, while driving to the polo field, Tommy is distracted by attractive Polly Durant, daughter of a long-time championship player, and follows her into a department store. Although the girl pretends to be annoyed by Tommy, she is more amused by his antics than angry. After she playfully bests him in a car chase through the woods, she drives to the polo field to meet her father. Just before she arrives, Nelson, the team captain, must tell his friend Durant that he is being replaced by Tommy. The gracious Durant takes the news like a gentleman but is hurt when he overhears Tommy making snide remarks about his age. Polly is angry when she learns that Tommy has been selected over her father and chagrined when he later finagles an invitation for himself to a club dinner. Unknown to Polly, Tommy has a soft heart that leads him to hire Sammy, a young boy who loves Tommy’s horse Pronto, to be his groom. During the club dinner that evening, Tommy tricks Nelson, who is in love with Polly, into sitting next to Cynthia, an attractive but forward girl, while Tommy sits next to Polly. Despite his antics at the dinner table and the dance floor, Polly is starting to like Tommy and goes out onto the terrace with him. Later, though, when he tries to kiss her on the drive home, she leaves him on the road and drives off. While walking home, Tommy sees a sign for one of his favorite haunts, The Red Lantern Inn, and goes there instead. The next day, when Tommy is hours late for practice, Polly becomes worried until she sees the still partying Tommy drive up in a car filled with pretty girls. Despite his condition, Tommy goes onto the field, then recklessly causes Nelson to fall from his horse. Although Nelson is not injured, the head of the polo club rebukes Tommy for his behavior, causing the egotistical Tommy to quit the team. Tommy makes matters worse when he accuses Nelson of being against him because Polly “is nuts” about him. After Mr. Van Buren learns that the polo committee has removed Tommy from the team, he angrily tells his son that he is going to sell his entire stable, even Tommy’s beloved Pronto. On the day of the horse auction, Tommy apologizes to Polly for his behavior, telling her that he is in love with her, but she accuses him of being too self-centered to love anyone but himself. When Pronto comes up for auction, Tommy's valet gives him $3,050 to bid after selling Tommy’s car and his own watch. Meanwhile, Polly has asked her father to bid on Pronto because she feels sorry for Tommy. Tommy is on the verge of winning Pronto when a third person bids more than Tommy has. He then leaves, not knowing that Polly has convinced her father to place the winning bid of $5,000 for Pronto. Later, in the stables, Polly is touched when she sees Tommy bid a loving farewell to his horse. Outside the club that night, Tommy looks on sadly as he sees Polly and Nelson dance, then sees that a fire has broken out in the stables. Rushing to help, he learns from Sam that all of the horses have been rescued except for Pronto, who ran to the back. Tommy dashes in and saves Pronto, badly burning his arm in the process. He asks Sam not to tell anyone what he has done, then leaves, but Polly sees Tommy’s coat and knows that he is the anonymous hero. Soon the international polo match begins, and on the final day, the countries are tied. In the final game, the British are ahead of the Americans when Nelson takes a bad fall and can no longer play. When the concerned Tommy goes over to him on the sidelines, Nelson asks that he take his place in the match. Tommy happily agrees, but on a strange horse and with an injured arm, he cannot play his best. Sam then rushes to Polly to tell her that they must bring Pronto from the stables. The two then go to retrieve her and arrive back at the field during the final chucker. Suppressing his normal tendency to grand, Tommy mounts Pronto and becomes a true champion when he helps Durant to make the winning goals. As he is cheered by the crowd, Tommy poses before the newsreel cameraman but now prefers to share the spotlight with Polly and Pronto.