I loved this show as I was watching it. The beginning of every episode is key because it sets the theme and slides in insights behind some of the actions the characters make throughout the show. Honestly, there were a few twists I just did not catch. As I said somewhere else on the internet, the show is worth watching just on the strong performance of Bae Jong-Ok as the main antagonist of the story. Also, stay around enough for the post-credit scene at the end of the series.