The IMP (1996)

Ching Kwok Shan receives a letter from twin sister Fun, feels something bad has happened (she has twin’s telepathy), and shares a van with a TV crew to get to the inn from where the letter came. This crew consists of director Mark, presenter Angie, and cameramen King Kong and Cass, and their brief is to film a rarely-seen aboriginal ceremony involving sacrifice.
They check into the hotel run by sexy (and clearly sinister) widow Jing Hua, and unsettling things being to happen. Shan and crew stumble upon a temple inhabited by Tao, a blind priest and a worried man, who gives Shan some guidance. Shan keeps fainting, so they take her to the doctor. Instead of checking her in, King Kong chats up the cute receptionist Yuan Jun. Then the serious sex and nudity starts. King Kong gets Yuan Jun’s gear off, Angie shows off her slim bod in an extended bathing scene while Cass peeks at her, Angie slaps his face then drags him into bed with her but chickens out. (Aren’t women maddening ?!).
Shan sees more vivid visions of her sister and others she does not recognize, becomes more unsettled, and finds unexpected comfort in Mark’s strong arms. Soon after, people start getting slashed to death at a serious rate. It’s no surprise to see that widow Jing Hua is involved, but her brother is the main villain (though I won’t spoil it by revealing his identity).
Hua and brother get into bondage, cruel taunting, and some very unpleasant punishment. Warning : this part could seriously upset the sensitive viewer ! As with many of these gory/apocalyptic endings, only two of the main characters survive to the end credits.