I feel a little like I wasted my time with this drama, especially because of the romance which was totally unnecessary and ruined it for me.
Also the mystery part wasn't really mystery as who is who is quiet obvious since the beginning, and there are some inconsistencies or illogical things here and there which show the lack of attention to details.
Maybe I'm broken but I couldn't really hate the bad guy, instead I understood him a little bit.
Anyway this drama is nor particularly good nor particularly bad, just mediocre.
I feel that D.O, Seo In Guk, Park Bo Gum and Choi Won Young are the ones who carried this show, without their good acting I would have probably dropped it