One of the most powerful stories in a kdrama that I have seen in a long time. Although some parts felt was quite plot convenient and the loose strings were tied up way too neatly, it did not feel absurd.
The acting is the highlight of this show to be honest. Song hye kyo and lim ji yeon's performances were so eerie in some parts that it gave me shivers.
It would have been great if we could have seen more parts as how it goes for Moon dong eun as he helps the male lead take revenge but this story is not about him anyway.