It was intense, gripping, at times hard to watch but what a ride. I could not stop watching this riveting drama from episode 1 and binged watched from start to finish. Tightly done, there were no unnecessary, repetitive scenes that most often plague Korean dramas.

The role of Moon Dong Eun was tailor made for Song Hye Kyo. SHK is a superstar but she's no Meryl Streep, Kim Sun Ah, Ko Hyun Jung or Kim Hye Soo. Her acting range is limited but this role of a cold, calculating and aloof ice queen fitted her to a T. Her calm and unassuming facade was a foil to an otherwise very traumatized, seething with anger, driven to panic attacks persona, a long way from getting over the painful trauma she experienced as a teen-ager.

I appreciate that it is a Netflix series and made for an international audience. The actors seem less inhibited unlike the other dramas where it is obvious that there are some hold backs especially when it comes to intimate scenes. Korea is still conservative so when it comes to those scenes, the audience get a vanilla version with cringeworthy consequences because they're not spontaneously done and very badly choreographed (for lack of a better word). This is the first time I saw Hye Kyo undress.

Great acting from the rest of the cast especially Lee Do Hyun. Although younger than SHK by more than a decade, he had great chemistry with her.

Only negative comment is that the second half is way too long in coming.