After 10 years separation from his wife, a film director (Jean-Louis Trintignant), imagines he can make up with her by giving her a part in his next film, an adaptation of Tshekov's "Three Sisters". He goes location scouting and stays in Bex, a Spa near Lake Leman, together with the three actresses : Julie, his ex-wife (Delphine Seyrig), the mysterious Cecilia, that his producer wants him to take (Lea Massari), and Esther (Valérie Mairesse), a teenager. They all stay in an old decaying hotel. In this isolated mansion the four of them will fight but also discover each other.