This is my first review and I am doing mainly because this drama was so bad. I've never imagined that someone can create something this illogical. During all episodes my reactions could be described as "wtf was this???" You could just recorded everything, showed it to the world and voila. The plot was good but there were many things that weren't clear. I love a good old mystery series with a twist. The beginning of the series gave me hope that in the end everything will turn better - from the annoying acting to the whole mystery thing. Sadly, it didn't happen. I can't even say how someone can praise the actors for their job. Personally, I thought that all emotions were magnified ten times. The mother was just annoying, especially the scenes where she always grabbed the leg of the possible culprit. Speaking about them, it seemed that the mother reacted without even thinking. Sometimes she seemed coherent enough and took some meaningful and rational actions but most of the times she was just annoying. The little girl - she was wonderful and cute. I guess, she was the smartest person in the series. Dong Chan - he wasn't annoying, he actually did a great job. But then I saw the last episode which was probably the worst way to end any drama. Well, and there I thought that it couldn't get any worse... The husband - miserable character. Cold, then doing stupid things and then a cry-baby. Dong Chan's family - I have nothing against mentally disabled people, truly, but in this show they all seemed too unnatural. The bad guys - well, at least they were intelligent, clever, bad and evil enough to make sure that the mystery existed at all. Although the main bad guy wasn't very convincing. Most of the times he looked just bored. If you want to see a good mystery series, you can try and watch this but in the end you will be disappointed. I would recommend to find something else.