Korean cinema does better action, crime than many industries. It should be a common knowledge by now. Even some of their bad ones have great action choreography and set pieces. With popularity of Squid Game and Parasite winning an Oscar, I would've thought lot more people would be interested in their content like k-pop and kdrama has huge following. Sadly this one isn't getting as many views as it deserves.
It's a well acted, well written and directed thriller that is shaded because Netflix isn't promoting it enough and people are still not over the whole drama over who will watch with subtitles.
The action is brutal, with sprinkles of gore. It's well shot and edited. Some of the stunts are novel and the lead actress can M O V E. Best thing about this season (and I doubt there will be another) is that there aren't many padding or fillers. Some flashbacks, forgivable cliches and plotholes aside the writing really works. There are enough twists and turns. The bad guys have motivation that make sense and not just pure evil.
Special mention to the original soundtrack and background score. Couple of them are cardio worthy. Another special mention to the action choreography which is done in a way that feels like a sub-practical fight and not clean martial arts.
Spread the word, recommend it to your friends. Watch it in original language with subs, because the dubbing is ....well everyone knows how Netflix rubbings are.