This is exactly what you call dark comedy or black humor; perfect combination of comedy elements & morbid satire. Inspector Koo, in my opinion, is also the investigative thriller of the year 2021 and I am amazed to see an immense investigative drama after a long while.

Inspector Koo (구경이) got a simple yet "not so basic" storyline. The title clearly indicates about the drama being centered by single person, i.e. Inspector Koo Kyung Yi. She's an ex-cop who now works as an insurance investigator at a company after retiring from police due to a tragic incident involving her personal life. Her desire to perceive truth behind different cases is so high that she can do literally anything to get her work done. She ferociously chases down a university girl, who seems to have been connected to a serial murder case, all of them staged as either suicide or accicent.

The drama has 3 stages in total:
i) know it all but no proof.
ii) have proof but can't catch.55
iii) oh! everything is a messs.

Koo Kyung Yi (Lee Young Ae) is a crazy woman; to say it in Korean, 'michin yeoja'. Food, alcohol and gaming are what she lives for, and can go insane when not provided with them. She got severe mental health issues due to past incidents, and can be sensitive when mentioned about them. Song Yi Kyung (Kim Hye Joon) is a university student with abnormal behaviours and considered a psychopath by many. She's a dramaclub member too and her past has made her like this. She avenges victims of several incidents who have been unfairly compensated by the law, by doing what? Killing the guilty. She's also know as Ms. K.

This drama infact is a all female story and is dominated by women all over; amazing actresses playing major characters. We have here, Chief Yong Sook (Kim Hae Sook) as the chairperson of a charity foundation. Na Je Hee (Kwak Sun Young) as the team leader of the investigative team B, Director Kim (Jung Suk Yong) as Chief Yong's right-hand man, Oh Kyung Soo (Jo Hyun Chul) as an investigator in the Team B, Santa (Baek Sung Chul) as Kyung Yi's assistant, Ahn Keon Wook (Lee Hong Nae) as K's helper, etc in the major roles. These are all profound actors, and hence the acting department has done very well in the drama.

The plot development is stupendously set up in the drama and the progression is very pleasing. The first impression from the 1st episode is sooo intriguing that you'll definitely move to the next without hesitation. This is something that'll keep you hooked throughout and never ran outta substances. There are places where you might feel like the consequences might be become uninteresting, but that's where the table turns and they start over again. That's the beauty of the drama. There are several peaks in this 12 episode script and I loved how they were able to keep the moods & vibes up till the very end of the show.

I don't want to believe that the writer is actually a rookie and it's their debut script as the main jakka. Sun Cho Yi jakkanim have done a great job such a mind blowing script with a compelling plus captivating progression. The character dynamics for each and every major character is very well drawn and everyone has got a fair share of importance, I feel. You're gonna love Koo Kyung Yi, Song Yi Kyung, Santa, etc. Special mention to the cute-acting namja Santa who'll melt your heart multiple times with his acts TT. There's also a portrayal of homosexuality (gay character) for one of the major roles (won't spoil) and I am happy they didn't use it in bad light.

Director Lim Jung Heum, known for the critically acclaimed thriller drama "Nobody Knows" did take the responsibility for Inspector Koo and was able to do a fabulous job there. This is clearly evidebt from the 1st episode of the show. Screenplay management, coordination, screen-editing pacing and execution is amazingly handled and the entire crew deserves credit for it too.

The sound production department as well as the composer for this drama Kim Tae Sung needs some serious praise. Loved how the drama has so many enraging OSTs that perfectly fit the mood of the drama and were appropriately used at instances. A major part of OST album is sung by TRPP, a Korean Indie trio, known for their rock, alternative and garage elements. The songs by TRPP are "Yeah (Round and Round)", "Coming After", "Sins", "Patience", "Liars (I feel Alive)" and "Limbo".The speciality of TRPP is that are the electronic instrumentals used in their songs plus their harmonic vocal line up, which is totally visible here.

Other than that we have "Up" by Hajin, "Watch Me" by SURL and "SURF" by INNI. Additionally TRPP has collaborated with Wayco and Mollo separately to remake Yeah (Round and Round). I swear to my life, there couldn't be any other song to accurately suit the drama and the mood it wanted to deliver. Music for Inspector Koo deserves 10/10.

The sense of choosing from right or wrong is the main concept of this drama. This drama reminded of this quote which I don't remember was said by the person, but it goes like, "Right is right even if no one is doing it; wrong is wrong even if everyone is doing it.". Everyone who has their standards to differentiate between the two and in case they committ mistakez they come up with certain prenotions to defend themselves by which the whole concept of righteousness itself is wronged. Perceiving the drama from this way, Inspector Koo is secondarily a revenge game where someone tries to avenge the right by unlawful means and another who tries to stop the former because righteousness can never be achieved when you commit the same mistake.

The drama also focuses on mental health issues. Abnormal and morally dangerous personalities induced by lonliness and trauma can harm the society in many ways and the drama is yet another portrayal of that. I am happy they has also emphasized on that.

The 2 important elements of Inspector Koo are investigation and comedy. Again, thia drama is a great treat for the lovers of investigative thrillers. Although you known who the culprit is, it really takes a great effort and time to figure the situation, motive and consequences. Connecting the dots and drawing a figure is all yoh have to do and this drama did it brilliantly. There are several highs and lows in the status but what matters is the end, and I assure it was as compelling as the entire show. Many shows claiming to be of dark comedy genre actually fail to understand what dark comedy is but the writer of Koo has done a good job in doing her homework. The main source of comedy is Koo herself and anything involving her might look serious but they simultaneously make you burst into immense laughter too. Several scenes which scare you off about the consequences, also seem weirdly funny, and that's how it should have worked, I mean that's how it happened. I had a good time watching the entire show.

Overally, Inspector Koo is an amazing drama and it has also those entertaining factors. I thoroughly enjoyed the show and honestly wanted more episode tho I don't wanna complain. The basic storyline of chasing after villain is not something new but the screenwriting and plus the execution along with music surely make it a stupendous thing. It's a must watch in my opinion with high reawatch value, so definitely coming back to it.