Possessed (2006)

Possessed is a 2006 Malaysian film that centers on two sisters, Amber and Lisu, who travel to Malaysia from China to pursue their modelling and singing careers. Until one day, Lisu goes missing and Amber falls into a coma. Sent back to China for treatment, Amber wakes up after five months and has no recollection of her past and anyone else. Her boyfriend decides to take her to Malaysia to help regain her memories. Once there, she starts getting nightmares and stumbles upon a photo of her and Lisu. Now determined to search for her, she encounters William who claims himself to be Lisu’s ex-lover. Bizarre things start to happen as Amber starts having visions of her sister and her nightmares become more violent.