In a port on the north-west coast of France, Caroline retires from her husband's dental practice at age 60. Her married daughters give her a trial subscription to “Les Beaux Jours”, a club for retired people, where she joins the computer class. She and Julien, the instructor who is in his thirties, feel a mutual attraction and start an affair of snatched encounters. Her behaviour becomes increasingly reckless: wearing heavy make-up, taking up smoking, drinking lots of wine, endlessly receiving and sending texts, ignoring family friends, disappearing at odd hours, and coming home with clothes awry. Her husband warns her that he and others can't help noticing. Nevertheless, she books a short holiday in Iceland for her and Julien. At the airport, as Julien is chatting to a young Englishwoman on their flight, Caroline realises that she must release him to his sort of world and return to hers. She rings her husband to fetch her home.
