What I liked:

Kang Yo Han was definitely my favorite character, but that is mainly because I am a sucker for morally grey characters. He was "the law" but did not abide by it and often used violence and money to get his way. However, it was to "protect" the country.

My favorite scene was the "we are the light" Was it predictable? Yes. The moment they pulled out their phones I just knew what it was going to be. But the scene was just *chefs kiss*

The chemistry between Kim Ga On and Kang Yo Han's family was prenominal. They were sooo cute. Moments of fluff I loved.

What I did not like:

Everyone was just so easy to manipulate. The good guys, and the bad guys. Jung Sun Ah was manipulated into believing that the virus was real, but after being told, she goes to the site, looks around and bam she suddenly turns good again. Like no one tried to stop her as she entered, she just made a pained face, and went back to the other judges to fix the shit she created.

Kim Ga On was also very easy to manipulate. His teacher turned out to be bad... Woah didn't see that one coming ;-;.... Oh no, turns out he did a very bad thing by reporting his co-worker to the police.

Then Oh Jin Joo was soo easy to manipulate as well. Like she believed this person who was bought over by Kang Yo Han, would end up betraying him. That would be her downfall.

Some scenes could have been elaborated a little more to increase suspense and the number of scenes trying to do suspense could be reduced so that it doesn't feel rushed.

Yoon Soo Hyun was also terrible in the way her character was useless. I didn't understand what everyone was complaining about until I got to episode 12. She was acting as a foil to the main character, but their romance was not even convincing. I knew nothing about their background to make me believe they were in love. Then when she suddenly dies, like omg you were told not to go there. Like everything is almost her fault. I did not even feel anything at her death since there was nothing to feel. She was not developed at all besides being a "cop." Like what drives her morals? Why does she not listen to Kim Ga On when he tells her that it wasn't them who killed them, besides the obvious reason that she is a cop. Because there are are evidently many corrupt cops who have reasons for their corruption like family, greed, etc. Furthermore, she is a main character, so its probably important to provide more background on her.

Overall: lots of background information could be provided to characterize their current development.

Story: Morally grey characters. Could have been better with the build ups.
Acting/Cast: Some of the characters could have been better portrayed. Might have been the screenwriters fault. Specifically Soo Hyun.
Music: Wow it was pretty good. Normally I don't remember music unless something stands out. This was memorable. I loved the opening song.
Rewatch value: I rarely re watch stuff. This one i probably won't because i already know whats gonna happen so there is no suspense.