Marie (Annie Girardot) teaches high school and has a 16-year-old daughter in her class. Divorced some years previously, she has some vague egalitarian notions about friendship with her students and leaves her door open to them. One of her protégés is found beaten up just outside her door, and an emergency physician comes by to treat her. When her daughter starts seeing someone she doesn't much like, and she begins having a brief affair (her first since the divorce) with the ER doctor, she begins to reconsider her policy.
Tomando como punto central las vivencias de Juliette, una mujer casada y con dos hijos que trabaja como ama de casa de día y prostituta por la noche, Godard realiza una especie de documental dramatizado sobre las vidas, las sensaciones, los personajes y los caracteres que pueblan el llamado nuevo París de los años 60.
