I put the story at around 7 because I feel that it is pretty confusing and I still wish that there were more developments on the backstory. More things could be fleshed out on that and some questions are left unanswered... HOWEVER Other than that plot hole, this show is superb. The writer has great attention to minor details and I found myself impressed how those little minor details make up the bigger picture. Park Min Young and Yoo Ji Tae were great here but Ji Chang Wook was phenomenal on this show. The way in which Ji Chang Wook was able to convey so much emotion in his eyes for each of the different persona he takes on is far beyond me. There are also no typical Korean drama cliches such as noble idiocy or too many deaths. I understand the comparison between this show and City Hunter is inevitable but both are solid shows on their own. This show exceeded all expectations of a Korean drama and raised the bar even higher. I've been watching korean dramas since 2004 and this is the one to beat.