Three couples and a single guy, from different social and career backgrounds, and of various ages, struggle with finding happiness in their lives.
| Actor | Role |
|---|---|
 Nicole GarciaOdile | Odile |
 Jacques DutroncGérard | Gérard |
 André DussollierPierre | Pierre |
 François CluzetPaul | Paul |
 Valeria GolinoSandra | Sandra |
 Gilles LelloucheFranck | Franck |
 Élodie BouchezJulie | Julie |
 Mélanie DouteyVéronique | Véronique |
 Eric de MontalierCédric | Cédric |
 Hippolyte GirardotFrançois | François |
 Thomas JouannetChristophe | Christophe |
 Jérôme KircherL'homme en noir | L'homme en noir |
 Sacha BourdoPipo | Pipo |
 SokoSabine | Sabine |
 Yves VerhoevenJean-Pierre | Jean-Pierre |
 Aymen SaïdiLe cycliste | Le cycliste |
 Gabrielle LazureLa patronne | La patronne |