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.
That Most Important Thing: Love is a French film directed by Polish filmmaker Andrzej Żuławski. It tells the story of a passionate love relationship between Nadine Chevalier, a B-List actress, and Servais Mont, a photographer, in the violent and unforgiving French show business.