The original title was Bad Police, but then changed to Jo Pil Ho: The Dawning Rage. I think this is a clever idea. It changes something that sounds generic into something more personal and intriguing.
Jo Pil Ho is a fascinating character. And Lee Sun Kyun did an amazing job portraying it. A dirty cop who is rude and always up to no good.
The writer also did an excellent job in building up Jo Pil Ho character. At first it was so easy to dislike him (which was intended to be) and as the story unfolded you will likely begin to root for him.
Nothing new with the story it self. But what makes this movie pops is you get the sense how realistic it is. It has realistic characters where they all are no saints. And realistic fight scenes where our protagonist were beaten countless times. This made me even more invested in the story.
One of minus point that i have to mention here is the unnecessary backstory of Sewol incident. It was a shame the writer seemed reluctant to dig deeper into this, using this tragic incident only for a decoration.