A Tale of Two Sisters (2003)

Having watched this 2003 Korean flick I think I must watch it again now that (I think) I know what is going on, since all of my assumptions while watching the film were turned on their heads by the end.  Strangely eerie and genuinely scary in places without resorting to Hollywood "boo" tactics, it left me feeling unsettled and just a little confused.  That second viewing might feel like a different movie.