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.

• Les Films du Carrosse
• Les Productions Artistes Associés
• Jean-Pierre Léaud
• Claude Jade
• Delphine Seyrig
• Michael Lonsdale
• Daniel Ceccaldi
• Claire Duhamel
• Harry-Max
• André Falcon