The 1st half was decently interesting, with great production, acting, and atmosphere - and I do love a good serial killer case. However the 2nd half was boring as hell. Honestly the 1st half and 2nd half are almost different seasons of the same drama that just so happened to air all together.

However what WAS good throughout was the acting of the 2 leads - they were amazing, and even without a lot of insight into them as people their scenes always felt so intense/charged. The other actors did a good job, but were ultimately forgettable characters because, again, the drama gave us the barest of insights into their who they were as people and their emotions. I won't say that was an acting flaw, because honestly for things like that that's a writing flaw, and ultimately they did well with what they were working with. Even for the leads, there are some things that they did that just were never really explained - like why Joo Won latched onto this 20 year old case in the first place (I think it's so he can solve it and coast back to Seoul victoriously, but still even then... why this case? why the obsession? why is he SO convinced it was Dong Sik??). I think the drama would've delivered a more emotional punch if they just took a moment to look at their characters more closely.

Overall as a drama, this wasn't as mindblowing as I thought it'd be based on what I read here, and I never really experienced a shocking twist, but this was still a decent crime drama with great atmosphere (mostly in the 1st half), production, and acting that's worth a watch for the dynamic between Dong Sik and Joo Won alone. Han Joo Won especially was my favourite, and honestly was a major player in keeping me watching this drama.

Focusing on the drama as a whole, I think it deserves a 7.5 for being in the end somewhat average but not horrible with good production and acting. Besides the inexplicably electric dynamic between Joo Won and Dong Sik, I think this drama is somewhat forgettable, especially the 2nd half which honestly made my feelings towards this drama cool a lot. However like I've said before I did enjoy the acting from the leads and the 1st half was interesting so I'll give it an 8.