Dew is a young computer programmer who meets Ton in Chiang Mai during her distant cousin's funeral. They immediately become attracted to each other and start to date each other over the phone. Back in Bangkok on Valentine's Day, Dew refuses to accompany her best friend, Ked, to a blind date because she is anxiously waiting for Ton's phone call. The consequence of this breaks Dew's heart as her friend is murdered by the blind date. Dew immediately leaves for Chiang Mai and finds comfort in Ton. The two start a serious relationship and marry soon after. However, their new-found happiness is cut short when Ton dies of a brain tumor. Dew is again left alone. Before leaving for Bangkok, she receives a mysterious letter, seemingly from her dead husband. As it turns out, Ton had written a series of letters prior to his death and arranged for them to be sent after his death to his widow. The letters help Dew through her grief. She finally is able to live without the love of her life and continues to live in Chiang Mai with their son, born after the death of his father.
Production and release
The Letter was the last film produced by Duangkamol Limcharoen before she died on December 8, 2003, at age 39. Director Pa-oon Chantarasiri, making her first feature film, agreed to take on the project, as a favor to her producer-friend. Starring popular Thai soap opera actress Anne Thongprasom, the film was a hit at the localbox office. Facial tissues were handed out in front of cinemas for free in anticipation of the audiences' reactions to the final scenes. "It's an effective melodrama, a movie of well-executed cliches and retro sensibilities," wrote Bangkok Postfilm critic King Rithdee. "But only Anne's performance – especially her ability to switch on a fountain of tears – conceals the insubstantial nature of the film's build-up and its banal, I-love-you-forever kind of dialogue. Don't forget to bring a handkerchief. Or better still, a towel." Variety critic Russell Edwards called the film "slow-moving" and "glossy". " doesn't just tug on the heartstrings but uses them to drop anchor in a sea of schmaltz."