It is amazing series. This is best for those people who have good taste in thriller and mystery dramas. Han ju won and lee dong shik chemistry is so strong and so emotional. For those who like bromance this drama is for you, litterally fantastic, i have watched full drama and still can't get over their chemistry. Not only chemistry but the storyline and all the actors who played their character in this drama completely did the justice to the drama. Every episode will change your mind. You will not find till the end who is killer and who is villain. Recommend the OST timeless. Please listen to it's so pure and sad.