This drama is pure genius! Thank you writer and actors for letting me have a blast watching this and keeping me thrilled with every episode! This drama never got boring - it was so interesting, I loved every second and I highly recommend it!!! There are tons of action scenes, weapons and fights that take place during this drama but you should expect that if you're watching a crime related drama ;) Story: In order to catch "bad guys" former detective Oh Gu Tak forms a team of "bad guys" to rid the city of the other "bad guys" < This was one of the things that attracted me to this drama ;) Cast: Lee Jung Moon (Park Hae Jin) *My personal favorite* (and the reason I started this drama), a genius "psychopath" they have labeled him but is that really what he is? His character had a childlikeness to him that I loved - he was vulnerable and honest. Park Woong Cheol (Ma Dong Seok) a gangster with a warm heart - I loved the bromance between him & Jung Moon <3 Jung Tae Soo (Jo Dong Hyeok) a contract killer who turned himself in. Oh Gu Tak (Kim Sang Joon) a former detective who is kicked out after his daughter dies b/c of being overly violent; He brings Jung Moon, Woong Cheol & Tae Soo together & forms the "bad guy" team (but are his intentions pure?) We see these guys build friendships with each other and learn how to care for other people - can bad people become good people? Music: The intense ost was right on par with every scene. Re-watch Value: 10/10 - I loved every second of this drama so I will definitely re-watch this <3 A couple of my favorite quotes: "Violence is the law of beasts. Non-violence is the law of people." - Gu Hyeon - "To sin is a human business, but to justify sins is a devilish business." - Jung Moon quoting 'Tolstoy'