What I basically think about this drama is that it was outstandingly written. First of all the negative comments didn't make sense. Please don't consider the fact that this drama is creepy. It has to be creepy and lee dongwok did the best job . The main lead aka Im siwan could have done a bit better but overall I loved it . The set , the cast , the dialogues etc were just perfect. The only thing that lacked in this show was the backstory. Everything was well written. We were just left with 1 episode and I thought there would be a back story for the villains but there wasn't any . The plot was good but we needed more backstory and character development. Now the next point is that there was a bit lack of character development for the police officer. She is good but I don't understand the point that the whole department ignored the fact that there was a crime in the residence. A police officer was missing but they just ignored alot of evidences. Except these it was overall a great show . I love how they ended the series and if you love psychological thrillers this is a great show. Don't just stop it because it was boring for a second.