

The trendy architect couple Valentin D. and Constance Brandt are celebrating a retrospective of their work at a Parisian museum of modern art. What no one knows is that Valentin has kept his Ch'ti origins a secret from high society. Meanwhile, Valentin's indebted brother Gustave sees borrowing money from his wealthy relative as the only way out of his predicament. He tells his mother that Valentin has invited the whole family to Paris to celebrate her 80th birthday and reconcile. When the provincials unexpectedly show up at the museum of modern art and the two completely contrasting worlds collide, things get chaotic...