Jan Dara is a boy growing up in 1930s
Siam in a wealthy,
dysfunctional family where
sex has a huge impact on everyone's lives. Jan is viewed by his father, Khun Luang, as cursed, since his mother died giving birth to him, and he is relegated to doing servant work in the house as a result. The younger sister of Jan's mother, Aunt Waad, is brought in to care for Jan. The
sex-addicted Luang has sex with many women in his household, including Waad, whom Jan is constantly exposed to. Jan becomes jealous since he has developed feelings for his aunt. Waad and Luang have a daughter, Kaew. Luang spoils Kaew and raises her to despise her own brother. Waad, meanwhile, resents her daughter's rotten personality and affectionately treats Jan as her own son instead. The teenage Jan befriends Khen, the son of the family cook, who has begun a secret relationship with Kaew's nanny Saisoi. Khen introduces him to sex by making him lose his virginity to Saisoi. He also falls in love with and pursues Hyacinth, a student he encounters and later escorts to her home daily after she finishes school. Luang's longtime mistress, the sophisticated
nymphomaniac Boonlueang, moves into a guesthouse on the estate. She is surprisingly compassionate to Jan, and she and Jan eventually begin a sexual relationship. However, his affair makes him hesitant to pursue a relationship with Hyacinth and he writes her a farewell letter. A teenaged Kaew, who had become attracted to Saisoi, begins resenting Khen and Saisoi after discovering their relationship; she later accuses Jan of rape when he catches her seducing Khen to set him up as revenge for pursuing Saisoi. Knowing her daughter's deceitful nature, Waad defends Jan, but Luang ultimately banishes Jan and Khen. Jan willingly leaves the house, having finally decided to stand up against his own father. As he packs his things to leave, Waad reveals to him that he was conceived after his mother was
gang raped by Waad's then-boyfriend and his friends, making it impossible to know who is his biological father. After years away from Bangkok investigating about his real father, the adult Jan is brought back to the family estate. Kaew has become pregnant and Jan is forced into a loveless
arranged marriage with his sister so that the damage to the family's reputation is smoothed over. Jan agrees to the marriage as long as he is promised the deed to the estate. He also deduces that Luang is the father of Kaew's child, having forced his daughter to have sex with him when she became an adult, and he uses this to finally gain power over Luang and Kaew in exchange for maintaining the secret. Jan rekindles his affair with Boonlueang. Jan learns that Hyacinth has died due to
typhoid fever during his time away from Bangkok. During his wedding to Kaew, Jan impulsively has sex with one of the family's maids in front of the portrait of his mother, with him coming to terms with the fact that he has repeated Luang's promiscuous and abusive ways. Kaew gives birth to her father's child, who has
down syndrome. She curses the baby, which leads to his name "Pree." Luang, already crippled from old age and
impotent after feeling guilty about getting his daughter pregnant, witnesses Jan have sex with Boonlueang and falls into a catatonic state. After helping Jan raise Pree and seeing that the house has settled, Waad leaves the family to become a nun. Jan discovers Kaew is also having a longtime secret affair with Boonlueang, and he agrees to his wife's proposal to share her. In exchange, he demands that Kaew give him a child since his true love, Hyacinth, has died. He repeatedly rapes his wife, despite her only being attracted to women. When Kaew becomes pregnant with Jan's child, she has the baby aborted instead to his and Boonlueang's horror. Feeling guilty for tormenting Kaew, Jan eventually becomes impotent as well and could not be aroused with anyone anymore, even with Boonlueang. Kaew continues to maintain a certain authority in the premises, while Luang remains catatonic even when his son/grandson Pree tries to play with him. As Jan looks over as the ruler of the household, he once again ponders his true father. ==Cast==