I couldn't get into this drama at first because it got me confused. I decided to come back and try watching it again. I missed a part that was key to the storyline and that is what confused me. This is the kind of drama that needs 100% of your attention. The storyline was very intriguing and a good mystery of who did it and why. So many suspects. The ending was amazing! Song Joong Ki (Jin Do Joon) Yoon Hyun Woo was awesome. This storyline wouldn't have been a success without his acting skills. He is truly a great actor. Lee Sung Min (Jin Yang Cheol) who played the role of the CEO, I need to applaud him as playing a senior, he was awesome. Shin Hyun Bin (Seo Min Young) who played the role of the detective, was more mysterious than the whole drama. I mean she was very good. The character she played had me until the last episode. But so did Song Joong Ki! If you like mysteries, this is a great one to watch. No Martial arts, no fantasy, and a tad bit of romance, I didn't pay attention to the wardrobes or the visuals, I was too busy concentrating on the storyline. This will be a rewatch for me.