Mika Muller, wealthy owner of a Swiss chocolate company (and played by Isabelle Huppert) has just married Andre Polonski (Jacques Dutronc). They had been married briefly years before. They divorced and Polonsky married a woman he deeply loved and by whom he has a teen-age son. His second wife died in a car crash after enjoying a cup of hot chocolate with her husband and son at Mika's house. The movie proceeds with tensions, family complications and death -- with Mika calmly continuing the tradition each evening of making and serving her delicious cups of chocolate.
There's little mystery about what's going on in Merci Pour le Chocolat, but the story drives with the question, "Why?" Why does Mika do what she does...and just what are all the things she's done? There's tension as it becomes clearer who should really be cautious about accepting Mika's hospitality. The pay-off is low key and a little unsatisfying. It's still a movie to enjoy.
The movie works because of Huppert's ability to seem imperturbable while you know probably unpleasant things are bubbling away below the surface. Let me tell you...for those fans of Britny and Angie, Isabelle Huppert, now 58, could chew you up and spit you out before you knew what was happening.