If you're looking for a good horror drama, I don't think this drama is for you. However to me horror isn't that appealing in general, so it felt irrelevant during the drama. The word disturbing comes to mind, instead of horror. It was more of a psychological journey to watch it and personally it left me speechless. It was a thrill to watch it from start to finish, so many plot twists you could not expect. The emotional scale of the actors was amazing, it was so nice to see such raw emotions on-screen. I feel like in many Korean dramas, the actors don't express themselves enough. To me the music in any TV show is very important and in this, it was one of the best. Absolutely beautiful. You have to have an open mind, when you watch this. Everything is not explained literally. It almost has an artistic feel to it, which not everybody can understand.