EVIL TWIN

Evil Twin is a 2007 South Korean film directed by Kim Ji-hwan and starring Park Sin-hye.

The film is set during the Chosun Dynasty. After awakening from a ten year coma, So-yeon discovers that the accident claimed the life of her twin sister. It seems that while running around with a group of other kids, Hyo-jin and her twin sister So-yeon fell into the lake, and despite her efforts, their mother could only save So-yeon.
Soon after So-yeon starts her recovery, a series of mysterious deaths begin to take place around the village and some of her neighbors are sure that she has something to do with the killings. While she fights to recover her memory, So-yeon realizes that people around her seem to like more her sister than her, and it looks like it is due to her being the one that used to mistreat people in the past. Despite her quiet position about all the happenings around her, So-yeon's mother appears to know more than she seems to know and her more dark secrets will soon be revealed.