This one is difficult to describe because on the one hand, the suspense of the series was well laid out until it neared the end but it was also littered with plot holes. But despite the plot holes, it mostly flowed better than most with exception of the weak ending. I really wish they zoned in on some necessary areas that would have given it more depth:

- It makes total sense for Kim Dan to mourn her Kim Ho Ki but really odd that she never mourned her real mother, not even when she was little. And no, the memory loss later doesn't justify this.
- They never provided any background on the children who were tortured and ended up as murderers, or even much about their interactions with each other. Sometimes it seemed they knew of one another and other times they didn't? How did the rest of the children end up where they did after the major event?
- The whole future vision aspect also didn't make much sense and there's only so much that can be interpreted if there's too many inconsistencies.

Having jumped into this one with just the brief plot summary, thought this one would be more episodic but it all revolves around peeling back layers from a past event. The comedic scenes were actual quite fun but it was awkwardly placed, and it sometimes took away what should have been more serious for the characters. However, what was great about this one was the actors and supporting actors. They managed to pull it together despite the flaws and poorly scripted character developments. And I really, really hope to see Kang Ji Hwan and Shim Hee Sub together again in better written/directed series. Both of them already bring their own charm individually, but they also have great on-screen chemistry. These guys deserve more spotlight in this arena and the higher score is mainly due to them.