A.Tale.of.Two.Sisters.2003.REMASTERED.KOREAN.1080p.BluRay.H264.AAC-VXT

After being institutionalized in a mental hospital, Su-mi reunites with her sister, Su-yeon, and they return to live at their country home. But strange events plague the house, leading to surprising revelations and a shocking conclusion.

https://www.imdb.com/title/tt0365376/reference/