Summary
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Estelle is an airline captain who lives with her protective husband Guillaume. Her seemingly perfect life spirals out of control when her former flame, Ana, reappears and she begins an affair with her.
When Ana suddenly disappears, she starts looking for her. At the same time, she is plagued by visions that interfere with her work as a pilot. When she causes a near-collision with another plane, blood is taken from her as part of the flight safety procedure. The results indicate anesthesia. Estelle suspects her husband of having sedated her and murdered Ana. Scraps of memory return, confirming this suspicion. She flees from the house and is hit by a car.
In hospital, the memory returns: after watching Ana having sex with another of her lovers, who is also the owner of the house, Estelle waited until the other women left the house. She discovers a camera that Ana had hidden to photograph her during her orgasm as part of her art work. Ana reacted condescendingly when Estelle confronted her. Estelle grabbed a stone and hit Ana's head, causing her death. When Estelle's husband arrived, he made the body disappear into the sea and injected her with an anesthetic, which has the side effect of causing memory lapses.
When Estelle realizes that she has accused her husband of a murder that she herself had committed, she reconciles with him and returns home with him from the hospital in a wheelchair.
In the last scene she asks him to step by to a cliff, where they look to the sea watching a woman in a red bathing suit coming out of the water. The beginning scene of the movie shows her bathing at that location, coming out of the water and seeing two people on the cliff, one in a wheelchair.
Source: Wikipedia (CC BY-SA 3.0)
