George Bryan Brummel, a British military officer, falls in love with Lady Margery who is engaged to Lord Alvanley. Despite her strong feelings for Brummel, she reluctantly marries Lord Alvanley under family pressure. Heartbroken, Brummel turns to a life of partying and socializing. He befriends the Prince of Wales and leaves the army, becoming the most famous and influential trendsetter in Europe. Despite his success, Brummel develops a disdain for the Prince and continues his wild lifestyle. Eventually, his actions lead to his downfall and only Lady Margery holds the key to his salvation.