It is one of those dramas where you don't know until the very end who is the serial killer because the episodes are directed to sway you away. ..Which I do not mind but there is reason in everything including these moves. So why? They really twisted it so much that every reveal seemed as likely as any other. And none particulary satisfactory because they abandon one interpretation they gave you another immediately in the next episode.

There is no depth to any of the characters. They tackled too many stories that at the end they all were one step from being obviously shallow.

I think the screenwriting was an issue. The actors elevated this drama but the gaps in plot were just so obvious. Literally one person in drama reexperiences assaults and they just go on about their life as if nothing happened. Then, the detective knows this person is in danger and drives to save them but his attention gets stuck on an image in the office of prospective victim... so he drives back to his apartment ignoring that someone is still trying to attack the victim next to the mentioned office. Also the recordings, video or audio, were used too much as plot device in this drama. Eh what would they've done without those recordings...

As for good parts. Music accompanying the murderer was a nice touch. Overall, actors did a great job. Although Sungjoon was not as strong of a lead in my opinion. I never changed my opinion of him as all brawn and no brains. But I again blame the screenwriters as Taecyeon did surprisingly well in Vincenzo and I believe he has it in him. Yoo Na's part was wholesome and gripping. Also Jung Insung actor was such good choice for the character. I hope to see him more in similar roles. And overall, plot-wise, the villain arc really took off in the last few episodes... so I was entertained, okay? I was entertained.

While gripping and emotional at moments.... ultimately at the end nothing makes much sense. Nothing gets resolved. Rather you are still unsettled, and I do not think that was intention. I wanted a meaningful punch but was left at 'meh, serial killer killed people I guess. And then we get who it was. And, wow, they all moved on.' I understand it was supposed to deliver a societal message which I got it in one way or another but it was not done in any impactful way.

I do think that this genre was better done by Mouse. So would suggest you to watch that one instead. I do think you will be entertained if you like this genre. It is just average, but not below average.

Thanks for reading.