Madame and her daughter Isabelle are wealthy owners of a house in France. They have a good worker. A maid called Christine. The power balance in the home is comfortable until Christine's sister Lea joins the home to work as a second maid. This connection reveals Christine has an unstable side when emotionally confronted. Especially about the past. Lea is more childlike and in need of protection and guidance. Madame is stern but not particularly cruel. She likes to talks about the sisters and run them down to show her power to her daughter. She is controlling of her daughter and tries to mould her. The sisters start a sexual relationship. It's not handled well. Isabelle sees how close the sisters are and may suspects something. Isabelle gets playful with Lea and neither Madame or Christine like this. There is jealousy in the sisters relationship and plans of a future by now. Lea has constantly been making mistakes in her job and Madame is growing tired. Christine's ultimate fear is being separated from her sister, which she believes is a possibility. Lea make a big error and Christine and Lea are backed into a corner.

The performances are good. Great character development and a great atmosphere telling of seperate lives in a small and intense home. You do feel the tension from the consequences and events in the home.