I just finished this one and though I'm really not into action, I loved it. Action is a tough one to get right, every move has to be carefully rehearsed or it'll seem fake and I spotted collections of minor mistakes not only in fighting scenes but after, concearning the results of the prior encounters and what not. Alas, since I'm more about acting than action, I overlooked it. Yes. The story is that good! As for the acting, I feel like Hae Jin could've done a lot better (not that he did bad, at all!). He has huge potential and I'm such a lover girl for that man but the psycho there... didn't really feel it. Seems like he's grumpy all the time with that emo hair of his but what can we do? His pouty perfect lips cooperate to that impression. Not much he can do about that. The others were magnificent apart from that dull detective. They couldn't have picked a worse actress (if we can call her an actress, that is). The damn woman doesn't speak, she murmurs in a sexy voice throughout the whole show and shows no expression at all, no matter what she's going through. Oh, my bad, she does seem ready to burst in tears all the time, I'll give her that. The show could've gone a lot better without her. Now I must praise Kim Sangjoong for his art... really. In his most emotional scenes I was torn between crying and smiling because he's just too good I was overwhelmed. I never pay much attention to music unless it's a complete turn off or turn on. It was okay, I suppose? Can't say for sure and rewatch value... I'm never 100% willing to rewatch anything with all those new dramas popping up from left and right and that's it. I recommend this drama to everyone. It's refreshing to escape those corny comedy/romance ones that are mass produced. Oh, and one bit of advice, never seek too much of accuracy in fictional productions. You'll miss all the entertainment and end up with a headache. It's called fiction for a reason.