On the eve of World War II four Parisians cope with the impending invasion of their city by German forces. While the French government braces for impact, the intersected lives of a young writer, a vain movie star, a French politician and a young scientist are examined as they attempt to deal with war and evade German spies.

For Pierre Brochant and his friends, Wednesday is “Idiots' Day”. The idea is simple: each person has to bring along an idiot. The one who brings the most spectacular idiot wins the prize. Tonight, Brochant is ecstatic. He has found a gem. The ultimate idiot, “A world champion idiot!”. What Brochant doesn’t know is that Pignon is a real jinx, a past master in the art of bringing on catastrophes...

Beautiful violin virtuoso Camille has two obsessions: the music of Ravel, and a friend of her husband's who crafts violins. But his heart seems to be as cold as her playing is passionate.