For young Parisian boy Antoine Doinel, life is one difficult situation after another. Surrounded by inconsiderate adults, including his neglectful parents, Antoine spends his days with his best friend, Rene, trying to plan for a better life. When one of their schemes goes awry, Antoine ends up in trouble with the law, leading to even more conflicts with unsympathetic authority figures.

The third in a series of films featuring François Truffaut's alter-ego, Antoine Doinel, the story resumes with Antoine being discharged from military service. His sweetheart Christine's father lands Antoine a job as a security guard, which he promptly loses. Stumbling into a position assisting a private detective, Antoine falls for his employers' seductive wife, Fabienne, and finds that he must choose between the older woman and Christine.

At Bertrand Morane's burial there are many of the women that the 40-year-old engineer loved. In flashback Bertrand's life and love affairs are told by himself while writing an autobiographical novel.

In the carefree days before World War I, introverted Austrian author Jules strikes up a friendship with the exuberant Frenchman Jim and both men fall for the impulsive and beautiful Catherine.

The rigid principles of a devout Catholic man are challenged during a one-night stay with Maud, a divorced woman with an outsize personality.

Claude Massoulier is murdered while hunting at the same place as Julien Vercel, an estate agent who knew him and whose fingerprints are found on Massoulier's car. As the police discover that Marie-Christine Vercel, Julien's wife, was Massoulier's mistress, Julien is the prime suspect. But his secretary, Barbara Becker, while not quite convinced he is innocent, defends him and leads her private investigations.

Madame Jouve, the narrator, tells the tragedy of Bernard and Mathilde. Bernard was living happily with his wife Arlette and his son Thomas. One day, a couple, Philippe and Mathilde Bauchard, moves into the next house. This is the accidental reunion of Bernard and Mathilde, who had a passionate love affair years ago. The relationship revives... A somber study of human feelings.

In occupied Paris, an actress married to a Jewish theater owner must keep him hidden from the Nazis while doing both of their jobs.

A committed film director struggles to complete his movie while coping with a myriad of crises, personal and professional, among the cast and crew.

Julie Kohler, whose husband was inexplicably shot dead on the church steps after their wedding, is prevented from suicide by her mother. She leaves the town to track down, charm and kill five men who do not know her.

At the beginning of the 20th century, Claude Roc, a young middle-class Frenchman, befriends Ann, an Englishwoman. While spending time in England with Ann’s family, Claude falls in love with her sister Muriel, but both families lay down a year-long separation without contact before they may marry.

Various experiences of childhood are seen in several sequences that take place in the small town of Thiers, France. Vignettes include a boy's awakening interest in girls, couples double-dating at the movies, brothers giving their friend a haircut, a boy dealing with an abusive home life, a baby and a cat sitting by an open window, a child telling a dirty joke, and a boy who develops a crush on his friend's mother.

Adèle Hugo, daughter of renowned French writer Victor Hugo, falls in love with British soldier Albert Pinson while living in exile off the coast of England. Though he spurns her affections, she follows him to Nova Scotia and takes on the alias of Adèle Lewly. Albert continues to reject her, but she remains obsessive in her quest to win him over.

Pierre Lachenay is a well-known publisher and lecturer, married with Franca and father of Sabine, around 10. He starts a love affair with air hostess Nicole, which Pierre is hiding, but he cannot stand staying away from her.

Parisian everyman Antoine Doinel has married his sweetheart Christine Darbon, and the newlyweds have set up a cozy domestic life of selling flowers and giving violin lessons while Antoine fitfully works on his long-gestating novel. As Christine becomes pregnant with the couple's first child, Antoine finds himself enraptured with a young Japanese beauty. The complications change the course of their relationship forever.

Sabine vows to give up married lovers, and is determined to find a good husband. Her best friend Clarisse introduces her to her cousin Edmond, a busy lawyer from Paris. Sabine pursues Edmond, with the encouragement of Clarisse, but Edmond does not seem very interested.

A tobacco planter on Réunion island in the Indian Ocean becomes engaged through correspondence to a woman he does not know. The woman that comes does not look like the picture he got, but he marries her anyway.

As the city of Paris and the French people grow in consumer culture, a housewife living in a high-rise apartment with her husband and two children takes to prostitution to help pay the bills.

Handed over to foster care by his mother—who's unwilling to give up permanent custody—the now-adolescent François understands that nothing in life is permanent, and his increasingly erratic actions reflect this knowledge.

Stanislas Previne is a young sociologist, preparing a thesis on criminal women. He chooses Camille Bliss as his subject of study and begins to visit her in prison for interviews. Camille became acquainted with trouble at a young age and justifies her actions by "fate-bets." She is currently in prison for allegedly murdering one of her lovers. As she tells Stanislas of her life and love affairs, his interest in her grows to more than just professional. Can he resist her charm?