Claude Chabrol directs this fantastic adaptation of Ruth Rendell's A Judgement in Stone that milks the story for every twist, turn, and surprise it can.
When Sophie becomes the housekeeper for a wealthy family, she must bend over backwards to keep them from finding out that she's illiterate. Soon, she begins to resent them and this resentment is only fueled by Jeanne, a local busybody who hates the family and everything they stand for. Together, they begin a most unhealthy friendship that could lead to some very dangerous places.
The chemistry between Sandrine Bonnaire and Isabelle Huppert as Sophie and Jeanne is off the charts and they carry the entire film as the two anti-social sociopaths. It's a fascinating relationship and one you won't soon forget.