Suspense dramas are not my favorite but I watched this one because it was also tagged as being a romance drama. It didn't really hit the mark for either genre for me. I thought the editing was rather poor. The first episode does not provide a very good foundation for what is going on an it took the next couple episodes for me to really get the gist of things. Also, while the flashbacks usually indicated how far back in time they were going, the flash forwards were generally not tagged and you had to glean from the context that the scene was happening in the future.
I also found the ending to be very unsatisfying...both the ending of the romance thread as well as the suspense thread...for the latter, some of the earlier flash-forward scenes provides misleading information about the fate of the villain that was intended to point you in the wrong direction as to who ultimately deals with the villain. That is just lazy/sloppy writing.
But on the bright side, I thought the acting was great. Seo Hyeon-jin and Jung Yun-Ha completely sold the animosity toward one another that their characters felt. And Gong Yoo brought to life how broken and submissive Han Jeong-won started and then how he was slowly rebuilt with the help of No In-ja.
Overall, I am glad I watched it but was also very glad it was only 8 episodes.