The Smart Set's review of the novel stated, "There is no plot whatever... Babbitt simply grows two years older as the tale unfolds."[4]
The first seven chapters follow George F. Babbitt's life over the course of a single day. Over breakfast, Babbitt, a successful real estate broker, dotes on his ten-year-old daughter Tinka, tries to dissuade his 22-year-old daughter Verona from her newfound socialist leanings, and encourages his 17-year-old son Ted to try harder in school. At the office he dictates letters and discusses real estate advertising with his employees. Gradually, Babbitt realizes his dissatisfaction with "The American Dream", and attempts to quell these feelings by going camping in Maine with his close friend and old college roommate Paul Riesling. Although the trip has its ups and downs, the two men consider it an overall success and leave feeling optimistic about the year ahead.
On the day Babbitt gets elected vice-president of the Booster's club, he finds out that Paul shot his wife Zilla. Babbitt immediately drives to the jail where Paul is being held, trying to think of ways to help Paul out. Shortly after Paul's arrest, Babbitt's wife and daughter go to visit relatives, leaving Babbitt more or less on his own. Babbitt begins to ask himself what it was he really wanted in life. In time, Babbitt begins to rebel against all of the standards he formerly held: he jumps into liberal politics with famous socialist/"single tax" litigator Seneca Doane, conducts an extramarital affair, goes on various vacations, and cavorts around Zenith with bohemians and flappers. He slowly becomes aware that his forays into nonconformity are not only futile but also destructive of the life and the friends he once loved.
When Babbitt's wife falls ill with acute appendicitis, Babbitt rushes home and relinquishes all rebellion. During her long recovery, they rekindle their intimacy and Babbitt reverts to dispassionate conformity. In the final scene, Babbitt discovers that his son Ted has secretly married Eunice, the daughter of his neighbor. He offers his approval of the marriage, stating that though he does not agree, he admires Ted for living his life on his own terms.
