Edna Pontellier, the wife of a successful New Orleans business man and the mother of two, vacations with her family at a seaside resort in Grand Isle, Louisiana. She spends much of her time with Robert Lebrun, a romantic young man who has decided to attach himself to Edna for the summer. After many intimate conversations, boating excursions, and moonlit walks, they both realize that they are developing romantic feelings for each other. Edna then realizes that there is much within herself that has remained dormant throughout her adult life.

When vacation ends and the Pontelliers return to New Orleans, Edna frees herself from the trappings of her old life, including her social position, her role as a mother, and her role as a wife. A major part of this freeing in Edna's life is accomplished through her affair with Alcée Arobin. Moving out of her husband's house, she establishes herself in a cottage and hopes that Robert Lebrun will return soon from an extended business trip in Mexico.

Upon Robert's return, Edna discovers that he is unable to come to grips with her newfound freedom. Indeed, he seems hopelessly bound by the traditional values of the French Creole community.