Dew, a young computer programmer, takes refuge in Chiang Mai. There, she is reunited with Ton, whom she met during her aunt's funeral, and discovers that he is the love of her life. Sadly, Ton is plagued by a brain tumor and passes away prematurely.
Unfortunately the movie The Letter is not yet available on Disney Plus.
| Directing | Pa-oon Chantornsiri | Director |
| Writing | Kongdej Jaturanrasmee | Screenplay |
| Camera | Naruphol Chokanapitak | Director of Photography |
| Sound | Boyd Kosiyabong | Original Music Composer |
| Production | Phalathon Siraksa | Casting Director |
| Editing | Patamanadda Yukol | Editor |
| Production | Ek Iemchuen | Production Designer |
| Costume & Make-Up | Thawatchai Petchvara | Costume Designer |
| Sound | Chatchai Pongprapaphan | Original Music Composer |
| Production | Nonzee Nimibutr | Producer |
| Directing | Chinoret Kamwandi | First Assistant Director |
| Production | Somsak Techaratanaprasert | Executive Producer |
| Production | Nonzee Nimibutr | Executive Producer |
| Production | Duangkamol Limcharoen | Producer |
| Sound | Suraprom Pinyosub | Sound Recordist |
| Sound | Thanapong Boonyachai | Sound Editor |
| Art | Kamolsak Khumsin | Art Direction |
| Crew | Sunit Asavinikul | Mixing Engineer |
| Production | Ratchana Nimchareonpong | Production Manager |
