Servais Mont, a freelance photographer who works taking compromising photos, gets fascinated by Nadine Chevalier, a tormented low-budget movie actress married to an eccentric film photo collector.

A young provincial has come to Paris to study Chinese. From a modest background, he has to do odd jobs to survive, finding accommodation as best he can in a furnished room where he is hardly free. Not being wealthy, he has solved his travel problems by getting a tandem, which, in the streets of Paris, is rather rare. Eccentric, unpredictable but tender, Georges, known as "Guidon Futé", falls in love with one of his classmates from Langues Orientales.