"Les Invisibles" of the title are a group men and women born between the two world wars. They have nothing in common except they are all gay and that they decided to be open about their homosexuality at a time when society rejected them. Despite general disapproval, they refused to deny who they actually were, thus maintaining their integrity. Today they talk before Sébastien Lifshitz's camera. Without hate. Without bitterness. With cheerful dignity.