I am feeling drowsy right now.. u know why?? BECAUSE I MARATHON THIS SHOW FOR 3 DAYS!!!! I think this is the most intense k-drama that i have ever seen that keep me on the edge of my seat. The cliff-hanger is killing me, i need to stop watching in the middle of the episode in order to rest, if not i would continue watching it.. This is such an under-rated drama compare to other over-hyped dramas, but the quality is better than some other dramas. The story is so dark and very twisted, you don't even know who is the bad guy and the good guy anymore, the line becomes blur in reality in drug cartel's world. It comes to the point that if we have the same interest and purpose we become allies, even though we are actually enemies.. and so on.. something like that. But somehow i don't understand and cannot follow up with the story and i am left with some questions. SPOILERS AHEAD Sometimes I will get lost in thoughts and I cannot catch up with so many Information that jammed into my brain. I need to repeat scenes to understand the story better. It's unexpected but i give a 8.5 for the story because some of information becomes repetitive with so many undercover agents revealed. Don't understand why the director assigned so many undercover agents, and they chased each other while doing the drug business? It becomes odd and confusing. The twist is also too much i think, so it makes me confused, but the intensity is real. I pity shi hyun, really pity his life, but he is such a strong character... and i instantly admire his character in cruel city.. It's hard to not sympathized with him and his gang. I need to warn you that this is not a romance drama, there is no romance at all, maybe only 1% romance of all 20 episodes.. Actor especially jung kyung-ho is very brilliant, his acting is flawless like i really can truly feel how he feels.. His pain, his struggle hmmm.. the rest of the cast are also wonderful.. I like all female characters in this show, they are strong. They are not cry-baby female who needs people to defend them. I put 8 for re-watch coz i think i need to watch it again in order to understand it better. Hmm coz after i finished watching this drama, i feel blank and i kind of forget about this drama although when i watched it i cannot stop... It seems that this drama failed to left a mark in my heart hahaha. Music is dark, intense and can build up tense and suspense. The ending is good, as expected, but after credit?? What does it mean? I don't understand it at all. That is the only issue i have, the ending.. i mean why after credit i see doc's son standing and calling someone...hmmph... It's only 2 seconds and there is no explanation, i hate it, it could be a 10 haha. I really hope that if he died then he died clearly.. if he lives, there is a scene where he is really alive... Anyway, recommended drama to watch if u like thriller, dark drama...