An intense, gut wrenching look at what trauma does to a person and how some wounds are just too severe to ever heal. All the childhood flashback scenes are harrowing, every scene is thick with dread and suffering and the violence has such an unsettling visceral power. As dark as this gets the brutality never feels forced or like gratuitous misery porn, we get a good sense of the how and why the bullies are allowed to run rampant. I also appreciated this show's nuanced take on justice and revenge. Kim Dong Wook and Kim Sung Gyu both gave excellent performances playing compelling characters, though I was frustrated by Dong Wook's lack of screen time. He absolutely killed it (pun intended?) in every single scene so I wanted more time with him. I think the show should have spent more time following him and less time following the cops investigating him.