Quick and small review: It was ammazing!! Everything about it was top! The acting,the action,the suspense and the mystery. It was 1 big Roller coaster ride of Drama and lot of things happening episode after episode.This is a truly masterpiece people should see if they like action/crime series. I didnt expect a korean crime series to be this good! After the first episode i joined a roller coaster ride of 20 episodes long pure fun and action :) a must SEE!!!