'Shutter' did it better
I know that the Legend of Arang is over 400 years old in Korea and they made this movie based on it, but quite frankly a Thai movie called "Shutter" took the same concept and did it MUCH better.
If you liked "Arang", you should watch "Shutter" to see how it's done properly.
If you haven't seen "Arang" yet, watch "Shutter" first, because otherwise it's like seeing a movie before reading the book. "Shutter" wrote the book but "Arang" feels like the movie adaptation.