Mathilda May won a Cesar award for Best Female Prospect for her potrayal of a young beauty, Juliette, who becomes the focus for an older man's obsession. Robert has been separated from his wife for a year and has left Paris for Vichy where he works as an industrial designer while drawing illustrations for a book about birds. Every evening he prowls outside Juliette's house, until one night he finds the courage to introduce himself to her. Juliette is unhappy with her engagement to fiance Patrick and enters into a relationship with Robert, falling in love with and then clinging to him. One night the two men meet and fight by the river, Patrick dissappears and suspicions fall on Robert.