Se jiang (1991)

Hung is disappointed when her man, Yuk Lung, becomes engaged to pretty Pai Lin. Hung and her scheming mother engage a sorcerer, Ko Yin Yau, to place a spell on him. So Yuk Lung becomes possessed by the Adultery Ghost, and he leaves Pai Lin in the middle of having sex with her, going to Hung. Pai Lin and her friend Nancy rush to Thailand, seeking the help of another sorcerer, Simol.