"George Byron Brummel," portrayed by John Barrymore, is a soldier whose military contributions are not particularly noteworthy. He finds himself drawn to "Lady Margery" (Mary Astor), and while she returns his feelings somewhat, she isn’t willing to forgo her social standing for marriage; instead, she marries "Lord Alvanley" (William Humphrey) and leaves him to lead a rather dissolute life. The most effective approach…