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.

After falling in love in Paris, Marina and Neil come to Oklahoma, where problems arise. Their church's Spanish-born pastor struggles with his faith, while Neil encounters a woman from his childhood.

In Paris, Bob Montagne is practically synonymous with gambling -- and winning. He is kind, classy and well-liked by virtually everyone in town, including police inspector Ledru. However, when Bob's luck turns sour, he begins to lose friends and makes the most desperate gamble of his life: to rob the Deauville casino during Grand Prix weekend, when the vaults are full. Unfortunately, Bob soon learns that the game is rigged and the cops are on to him.

The son can't stop wondering. What is dad going to do after retirement? So he starts filming him. Dad wants to have a shot at becoming a street artist in Montmartre, Paris, a longtime dream of his. To the mother, it sounds like just another absurd dream. Anyhow, 2 years later, the father puts his plan into action and sets off for France. Right until his departure, the mother doesn't know what to make of it. While dad spends one month as a street artist, the son and mother follow him to Paris...