At the Halle Saint-Pierre, the Mecca of gross and singular arts, Martine Lusardy, director and curator of the exhibition, guides us behind the scenes of the museum on the occasion of the setting up of the exhibition "Art brut japonais II". From the unpacking of the works to their presentation, the team has to show ingenuity to highlight creations that are often out of frame, unpublished. The spectator discovers the specificity of Japanese raw art and the commitments of a team to show a hidden face of contemporary art.