Sarah Morton, a middle-aged English mystery author based in London, who has written a successful series of detective novels, is experiencing writer's block that is impeding her next book. Her publisher, John Bosload, offers her his country house near Lacoste, France, for some rest and relaxation. Sarah takes him up on the offer, hinting that she hopes John may visit. After settling into the spacious, sun-filled house and meeting the groundskeeper, Marcel, Sarah's quietude is disrupted by a young woman claiming to be John's daughter, Julie. She arrives late one night explaining that she is taking time off from work herself. She eventually tells Sarah that her mother used to be John's mistress, but that he would not leave his family.

Julie's sex life consists of one-night stands with various men, and a competition of personalities develops between the two women. At first, Sarah regards Julie as a distraction from her writing. She uses earplugs to sleep during Julie's noisy nighttime adventures, but develops a voyeuristic fascination with them, abandoning the earplugs during one of Julie's trysts. Sarah sneaks into Julie's room and steals her diary, using it in the novel she is working on. The competition comes to the fore when a local waiter, Franck, is involved. Julie wants him, but he appears to prefer the more mature Sarah, having struck up a relationship with her during her frequent lunches at the bistro.

An unexpected tragedy occurs after a night of flirting among the three. After swimming together in the pool, Franck refuses to allow Julie to continue performing oral sex on him once Sarah, who watches them from the balcony, throws a rock into the water. Franck tells Julie he is leaving. The next day, Franck is missing. While investigating Franck's disappearance, Sarah is told that Julie's mother died years earlier, though Julie had spoken of her mother as if she were alive. She returns to the villa, where a confused Julie thinks Sarah is her mother and has a breakdown. Julie eventually recovers and confesses that Franck is dead after she repeatedly hit him over the head with a rock as he tried to leave her at the pool. His body is in one of the sheds.

When Marcel becomes suspicious of the mound of fresh soil where Sarah and Julie have buried Franck's body, Sarah seduces him to distract him. Julie leaves, thanking Sarah for her help and leaving her the manuscript of an unpublished novel she claims her mother wrote, which she had previously said John made her mother burn. Sarah uses the mother's manuscript in her novel.

Sarah returns to London and visits John at his publishing office with her new novel, titled Swimming Pool, which she anticipated he would reject, so she had it printed by another publisher. His daughter, Julia, arrives just as Sarah is leaving, but is revealed to be a different person than the girl who came to John's house in France.

The intentionally ambiguous ending sparked much confusion and controversy. One interpretation is that Sarah was alone at the villa the entire time. This would mean that Julie is a fiction conjured by Sarah for the purpose of her new book – also titled Swimming Pool – which she presents defiantly to Bosload at the end of the film. Ozon has said:

Charlotte's character kept mixing fantasy and reality. Although in Swimming Pool, everything related to fantasy is part of the act of creation, so it is more channeled and less likely to end up causing madness. In terms of directing, I've treated everything that is imaginary in Swimming Pool in a realistic way so that you see it all – fantasy and reality alike – on the same plane.^[5]

On the DVD release there are 12 minutes of deleted scenes which run into each other,^[6] with shots of Sarah walking around, visiting landmarks, writing, and so forth.^[7] Julie is nowhere to be seen in the footage, and perhaps the "deleted scenes" can be seen as a short documentary of "what actually happened."

Box office edit

Swimming Pool grossed $10.1 million in the United States and Canada, and $12.3 million in other territories (including $4 million in France), for a worldwide total of $22.4 million,^[3] against a budget of €6.1 million (roughly US$7.8 million).^[8]

Critical response edit

On the review aggregator website Rotten Tomatoes, the film holds an approval rating of 83% based on 155 reviews, with an average rating of 7/10. The website's critics consensus reads, "A sensual thriller with two engaging performers demanding our undivided attention."^[9] Metacritic, which uses a weighted average, assigned the film a score of 70 out of 100, based on 37 critics, indicating "generally favourable" reviews.^[10]

Roger Ebert gave the film a positive review, writing, "François Ozon, the director and co-writer (with Emmanuèle Bernheim), understands as Hitchcock did the small steps by which a wrong decision grows in its wrongness into a terrifying paranoid nightmare".^[11]

Neil Smith of the BBC also praised the film, calling it a "compelling psychological melodrama" and "Hitchcockian thriller".^[12] Sarmad Iqbal of the International Policy Digest wrote that the film's "intriguing yet mystifying mix of erotica and thriller set in a part of France that is a far cry from bustling Paris makes you fall in love with it. It is not just the plot, the setting and the way actors have immaculately performed their roles will make you shower praise on this film but also the soundtrack by Philippe Rombi".^[13]

Moira Macdonald of The Seattle Times called film's director a "master of mood",^[14] while Variety's David Rooney called the film a "sophisticated [and] unpredictable mystery".^[15]

• Swimming Pool at IMDb  
• Swimming Pool at AllMovie  
• Swimming Pool at AlloCiné (in French)  
• Swimming Pool at the British Film Institute