Letty Shell, a clerk in a London brokerage office, is discouraged by her lack of fine clothes and social position. She becomes infatuated with Nevill Letchmere, a debonair idler from a good family, and believes that he wants to marry her, but after her boss, Bernard Mandeville, who has risen to power and wealth, and who wants to marry Letty, warns Letchmere to keep away from her, Letchmere confesses that he is married. Disappointed, Letty accepts Mandeville's proposal, but when she sees Mandeville's boorishness in a restaurant, she returns to Letchmere. Just as she is about to become his mistress, Letchmere receives word that his married sister has eloped with a lover. When he curses his sister for acting like a "shop girl," Letty realizes that he views her and her class without respect. She leaves and accepts the love of her faithful friend Richard Perry, a poor photographer, whose rich uncle is going to help him in business.