The movie focuses mainly on Sand's attempts to seduce composer Frederic Chopin, partly through her art, which I can relate to. She is thwarted, at least temporarily, by her "friend", played by Bernadette Peters, in ways that many of us are all too familiar with. Hugh Grant plays Chopin and Mandy Patinkin plays Sand's former lover Alfred de Musset. It's a very entertaining film. And the men's costumes are great.
Interesting article about Judy Davis and Impromptu here.