[horcrux2007]

Originally Posted by Sculpt

I don't tend to go for films like this -- "back from mental institution, strange things happen at home".

I'm not going to see this. Would you tell me what were the "surprising revelations and shocking conclusion"?

I'll put it in white.

Su-mi had multiple personality disorder, and the stepmother and her sister were her other personalities. Almost the entire movie was a hallucination. The sister was dead the whole time, and the stepmother wasn't actually there until almost the end of the movie.