Sa'yew is the name of the film, an expression of sexual thrill that one usually hears only from a lover in the heat of the moment. First-time directors Kongdej Jaturanrasamee and Kiat Songsanant spin the tale of a young tomboy student, Tao (played by actress Pimpaporn Leenutapong), who takes a freelance job for her uncle's porn magazine writing sweetly romantic stories based on her virginal fantasies.

When a newcomer named "the Stallion" (played by rock star Bu Blackhead) finds success producing raunchier material for the magazine, Tao realizes she is handicapped by her inexperience and sets out to experience sex first hand, eventually leading to an encounter with her macho competitor.