The Dubuffet Case telles the story of art critic René Deroudille's struggle to convince the Lyon Fine Arts Museum (France) to buy a Jean Dubuffet painting 1956. Although known around the world, no french museum had yet dared to acquire any of Dubuffet's work. The twisting suspensful drama is told through the fascinating correspondance between Jean Dubuffet, René Deroudille and collage artist Philippe Dereux, intermediary between the painter and the art critic at the time. If the painting by Dubuffet, the "Blond Landscape", is at the center of the story, it shares the role of the hero with the three other protagonists.