I love how the story is about things happening in a day. Jeong Jian (Kim Hyejoon), niece of Jeong Jinman (Lee dongwook), getting a call from police station informing about her uncles's death. The story then proceeds on Jian being revealed of what her uncle, Jeong Jinman, did for a living and how she has to survive all the fights caused by the consequence of Jinman's action.
Now that her protector Jinman was no more, she is being bombarded with bottles of information and is running to survive.
A survival thriller with amazing fight scenes and a fully packed cast. Both Kim Hyejoon and Lee Dongwook understood their assignment. The mix of past and present but still perfectly separating them made the series real good.
There was no beating around the bush, no romance. Just pure thriller!

Only thing i personally felt as a drawback was that, there was a lot of repeated scenes in episode 7 which was unnecessary and could have been easily incorporated in the previous episodes.

In general, personally, the series was a great watch and if given a chance to watch the series again for the first time i gladly would! :) (PS: would still rewatch nevertheless)