The film is set in 1940s Saigon, where 17-year-old Marie (played by Aude Landay) lives with her family. One day, she meets a wealthy 27-year-old Chinese man, Yan (played by Xie Xian), on a ferry crossing the Mekong River. They begin a passionate and intense affair, which becomes increasingly complicated due to their different backgrounds and the societal norms of the time.