I started this drama for fun. Eight episodes had already aired so I had a little to catch up on. I waited for the episodes every weekend, and was rarely disappointed after I watched them. You ask why? This drama had the nice ability of having a lot of plot twists. Interesting plot twists. I was wondering during every episode. The narration moments could appear predictable, but when you least expected it, the result surprised you. Of course there were few things I had imagined would happen and they did, but over all it was like that. The execution of the story wouldn't have been possible if there wasn't a good acting behind it. I appreciated Yan Jin Sung's portrayal of her characters. She made you hate one and love the other, and was able to act according to who she was playing! This is what I call being a good actress and I hope for her to be the lead in future dramas. Lee Hong Ki also did a good job with the main lead but he needs to add more emotions to his characters not to make them look too stiff. I was satisfied with the ending. The backstory was explained although it had its glitches that could be forgiven if we see this drama as a ghost/supernatural story and well, fiction. The main leads also had a very sweet ending and everyone got something in the end. Even the evil ones got to be redeemed in a way. I think most of the story was resolved. I suggest to watch this drama if you are looking for a mysterious story with a touch of supernatural.