let me just begin saying that this show exceeded my expectations. out of most thriller/crime korean drama's i have watched, this one was definitely the best i've ever come across. simply because the cast for this show is absolutely insane and the emotions they portray in it is impeccable, i felt so engaged in their acting because it felt so real. if anyone is thinking of watching this show, i 100% recommend although it does touch on intense topics which may be triggering for some.

[spoilers]
one specific part i enjoyed about this show is that they included how the criminal profilers felt themselves and didn't just focus on the criminals half, those who enter these types of jobs suffer a huge amount and song hayoung really emphasised that during episodes 10-12, that scene was incredible emotional and the acting was so spot on.

overall i rate it a 10/10! the acting was phenomenal, the storyline was so well developed and i really enjoyed the osts. however i wouldn't rewatch it only because it is a really emotional show and it's not so much a show that you'd want to rewatch although it was outstanding.