The drama started off well - the first few episodes had you suspecting every one, except for those whom you reasonably do not expect to have any motive. Prepare to be surprised in more ways than one.

The plot kept you actively engaged: you contemplate who could be involved in the crime and why. This makes you want to understand each character's motives better. I will say the excellent acting kept the drama going, especially the four antagonists, because the drama had some flaws that would have made you want to abandon it. They executed the roles they were provided so well, it was a pleasure and, at the same time, annoyance (the good kind) to watch. The two men who got on my nerves the most were Hak Bum and Tae Suk. There is one character in the group who undergoes massive growth, enough for you to want to root for him. Lee Jin Wook was great as an enthusiastic detective - he was a relief to watch. Also, Jung Eun Chae was someone I was with too - she turned from a woman who did not speak for herself enough to a woman who made some healthy decisions for herself and her children. The show displayed the ills of society and lack of accountability well.

Now for the negatives:

The writers made some poor choices when it came to Ja Hye, who was portrayed as a righteous person when Go Hyun Jung portrayed her and the exact opposite when Park Jin Hee got the role. I understand why Hyun Jung left, if her dispute over her character holds true. If the intention to show Ja Hye in that light had been there from the get-go, the writers should have dropped subtle hints about her sinister intentions. It was as if we were dealing with a new chaacter all of a sudden. Ja Hye's motivations fit the premise of the the last twenty episodes or so, but before that, she was someone else entirely, but then the new face highlights the change more. Jin Hee did well with what she was provided - she made me hate Ja Hye enough to want to hit her.

*spoilers ahead*

I would have loved if the last episode had not been about Ja Hye's hardships but more conclusive about other characters. It made it seem as if what she had done was reasonable, given her past, which is a load of bull. The last episode painted every one of the four in a bad light, when one of them had actually undergone a huge development. Not only that, but Ja Hye's explanation of "restoring" justice (or so her words implied) on her live show made it seem as if she was a hero, not the villain. After all her talk about accountability, she decides to kill herself. It would have been a good end had they not gone on to show her meeting her daughter, as if this was her destination all along - towards the one she loved, hitting home the point that the victims' suffering due to her anger was all for naught, because she had been mistreated too. What a mess. The message they wanted to convey was received, but it felt they went back full circle when they decided to show a mother's love.

*spoilers ended*

Overall, the show was enjoyable for the most part, particularly because of the acting.