The opinions on this drama are somewhat totally opposite. The one half loves it and the other one well not hates it but wouldn't recommend it. I'm with the first halfxD Some might think why would she give 10 stars and well I thought long about what to write to explain these 10 stars, but well, it's my opinion so let's get started.

First of all, the story. The story isn't really that special like something you've never seen before. We have someone who wants to take revenge on people who made him who he is although he has no idea who he is actually taking revenge on. Our main lead is searching for a ghost. And that is what makes this story so interesting. Every epsiode you think 'ah so that's what it's like now I understand' but in the end you didn't get anything at all. I like this kind of thrill but I can understand why people didn't like the drama because of this fact. The script was executed pretty well with almost no plot holes left in the end.

Secondly the acting and characters. Well as a huge fan of Namkoong Min of course I watched it mainly because he was the main lead. And he didn't disappoint. He portryed Han Ji Hyuk to such an amazing extend that I thought he was a different actor (maybe because of his body transformation) but hell, some say he acted like a robot but that's exactly what made him so perfect for the role, since Han Ji Hyuk is almost like a robot with no feelings left inside of him. Apart from that all the other members did a splendid job as well. I was most impressed by actress Kim Ji Eun. It was her first 'big' role and she did such an outstanding job with all those senior actors beside her. As for Han Ji Hyuk we go with him through a huge character developement as he came back and did not trust anyone. He was cold and did everything on his own not taking any help from anyone. On the other hand we have Yoo Je Yi who is cheerful and tries to warm up Han Ji Hyuk, which she did successfully. He started to trust her, open up to her, and they worked together. The displayal of teamwork and partnership was the most beautiful I've ever seen.

The music matched the atmosphere of the drama as well. The OSTs were greatly chosen for certain scenes and underline the feelings of the characters in the best way. Though it is sometimes strange when the whole OST is in english and you only understand half of it but what can I say, guess it's a trend now... Still loved it

The execution of the drama was well produced, we have great action scenes, some hinted funny moments and some really touching and heartbreaking moments as well. The perfect mixture for a binge watcher. I can only recommend this drama and I will also watch it again in one go. Watching these dramas ongoing is always a great deal to add to the thrill but when you watch them again in one go there are some things you didn't recognize before^^