Tale of two sisters

Ok, we have world movies.Yippeee....Every friday at 11pm they play 50 movies to watch before you die. So we settled down to watch (or rather I settled down to watch and left Prashanth with little choice) Tale of two sisters, a South Korean horror movie. We watched it from almost the beginning. The beginning itself was very interesting, large isolated house, creaky stairs, dark corridors, sinister noises and characters. Engaging, we thought. Settled deeper into the sofa to watch the rest. It is a tale of two sisters whose father remarries and hence beings their tale of woes. Simple enough.
So far so good, we established that the stepmother is evil (now she is, now she is'nt) but hey, we've watched too many hindi movies to know the difference. Mother - always good, Stepmother - mostly evil. So we watch and watch..some more shots of the sisters, the stepmother, the mother, the creaky stairs, the dark corridors, some blood for a good measure. An hour and a half into the movie and we still have no idea who is the ghost and are begining to get confused who are the sisters and who is the mother. They all look alike. They do.Honestly.Promise. Flawless skin, lovely hair and complexion. So we watch to keep track. It's more about who's who than who's ghost now. So we keep watching and voila!!!!...the movie ends....Still no idea who's the ghost, still no idea why the sisters are scared, still no idea who IS the sister or who's the mother, still no idea why we watched.
So if you are planning to watch, please keep track of all the women from the beginning, dont lose track of their differentiating moles, birthmarks etc. Keep looking for the plot and the ghost and please let us know.