There's been multiple promising thrillers with less-than-ideal endings, so I've been holding off on this one (still recovering with WTH endings from other dramas).

Script isn't completely unique, but the execution and pacing was solid. No overly absurd twists and not overly gore.
Short 11 episodes, there won't be any supporting character development and most of the bad characters were just one dimensional. The focus will be entirely on the leads.

Amazing pair up:
Shin Ha Kyun (previously in Beyond Evil) had a similar vibe, but I enjoy his character in this one way better. His character transition from a beat down lawyer to morally twisted vigilante is spot on.

Kim Young Kwang (coming from Somebody) is the perfect choice for Seo Do Young. He's charismatic, psychotic & calculating all at the same time.

A partnership that started out from fear develops into a promising business codependence. There were hints of friendship and trust at times but as the greed & ambition expands, it leads to the ultimate ending.