A horror about a woman taking her sisters place

Movies
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Husband and wife arrive at the house. The husband leaves for work every day, and his wife is constantly frightened by something in the house.
I also remember that his wife has a sister. There’s something mystical in the basement. And at the end of the film, this sister took the form of her sister to live with her husband. And she herself was left in the basement or killed. I do not remember.
Thank you very much in advance

6 Answers

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Find Me?

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Thank you! My friend is looking for this film.I have edited the post and added some more info.

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Alone (2007 film)

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Is it this horror movie? called Alone about a twin sister replace , of Thailand , Korean country