I've been planning to watch this drama for 4 years and somehow couldn't get around to it. Recently I was looking for something to make me sad and I found it. Great acting, full of drama, mysteries, death, murders, crime story and Seo In Guk in the main role. In my opinion he played the role very well. There were some things that I didn't understand too much, especially that they completely forgot about the first murder. After all, the main character was also involved in that murder, so why didn't they do anything about it. I also don't understand why Jin Gook stabbed Moo Young back then if he felt so sorry for him. Perhaps he was afraid that Jin Kang would find out about her past? I don't know because it wasn't explained.I fell pain when because of a stupid joke about Jin Kang being Moo Young's sister, it ruined everything. But on the other hand, I really like it because I like to feel that way while watching tv shows. I'm very happy with the ending, it made me sad and cry, which is what I was looking for. It's just a pity that I watched it after such a long time and missed a really good drama.