I'm writing this review and the drama isn't finished yet that's how excited I'm about this underrated gem
This drama is released at the same time with so many good Korean dramas and two of the same genera with more famous younger actors and in public Korean channels not OCN a private channel so you can understand why it's not famous or has higher ratings that's the only reason I could think of

because this drama is just a fresh breath of air among so many disappointing dramas

The actors
are just perfect ,, they aren't Idols or that young and handsome as usual but their acting is top notch especially the two Male leads the two Ajussis oh ,, I can't say enough about those two great actors ,, they are both famous of previous hit dramas Mouse and Squid game ,, their chemistry on screen as best friends is just breath taking
I don't want to exaggerate and say they love each other because they do as brothers in the drama the detective really really cares for the doctor so much that no one else care about him as he did and the bromance is epic in so many episodes and so many great friendship scenes that makes your heart flatter also their friendship with the female lead is just as amazing no love triangle nor much romance but there is slight romantic interest between the detective and the female lead
her English accent by the way is perfect for a korean actress I think she's actually partially American ,,, she was casted perfectly for her role

THE STORY
It's so fresh as a subject not typical crime story has unique take on Arsonists using chemical fires as it's way to commit murders
also the mystery is so complicated with so many variable and hidden secretes that you can't guess who did that then and now for the first half of the drama and the second half you start to guess but no luck until near the finale
the pacing is fast and there is no dull or boring episodes at all

The production is really good also the CGI ,, there is no gore nor obvious violence nor inappropriate scenes at all you can watch this with you family at ease you won't feel uncomfortable ever

The Bromance is a bonus and it gave the drama so much more value to the humanity of it and how humans connect with each other trying to help each other when they are the most vulnerable
it's classy and has great emotions you won't ever regret watching it

I so recommend watching this amazing drama and I decided on re watching it again after it finishes