I enjoyed this kdrama, more than i thought I would. I watched this all the way back when it was airing, but I'm just coming around to writing my review. This is the first detective/crime-solving kdrama I've seen, and it did not disappoint. So intense! You will get the answers ur looking for by the end of this drama. The acting was superb, and I loved all the characters (except the stupid female character). Everyone played their roles to the T. Started watching for Park Tae Jin, and I loved his character, but my favorite was Ma Dong Seok. The story is about this ex-cop/detective who's reinstated by the commissioner or whoever because his son died. The ex-cop/detective (Oh Goo Tak) then gets together 3 criminals (who are actually locked up at this point, like in prison) to help him solve crimes. But what's in it for the criminals? Whoever catches the culprit of each crime gets their sentence reduced. But there's more to the story. Why did Goo Tak choose those 3 criminals? They're all connected in some way, and the drama delves into that. So not only are they trying to solve each individual crime (which is already interesting), but they are trying to solve a bigger picture. I won't say what the bigger picture is, it's much more fun to watch and find out. But the story is very interesting and exciting, and will keep u at the edge of ur seat. The music is pretty forgettable (at least for someone like me who doesn't really pay attention to the ost unless it really sticks out), but the music did go really well with the drama, so I have no complaints. And, I just looked up the ost to remind myself of the music, it's really good, very downloadable too lol. Now, would I rewatch this drama? Yeah, I would. I really appreciate the cast's excellent acting, and I love the overall theme. Forgiveness. Ooohh, I'm getting chills just thinking about it. Not my favorite kdrama, but def one of the better ones I've seen. I'd recommend the drama to just about everyone. I'm trying to get my sister to watch it, but she doesn't listen to my recommendations (her loss). Anyways, if you don't want to watch it for the intricate story, at least watch it for Park Tae Jin's sexy lips!