I think it was really good series <3
The drama made me think soo much for every minute I was watching. The tensions between the main leads (wi ha joon, ji Chang wook , Im se mi, Bibi) it was really interesting and thrilling. This series really has a good story line , although you will think it pretty obvious but actually it wasn't!

The show was mostly focused on the development between our undercover officer junmo and the drug dealer jung gi cheol which is really nice to watch ...
The action scenes were just Chef's Kiss , they were soo nicely directed and acted cuz while watching the bloody scenes I was feeling soo tensed therefore it didn't got me bored also ...
I would recommend this drama to the people who like to watch action scenes and yes this drama will teach you the real meaning the word 'Betrayal'

SPOILER ALERT (READ THIS ONLY WHEN YOU HAVE WATCHED THE DRAMA) I think people are targeting the female lead too much but why don't they see that junmo was also helping Lee hae ryeun to escape the country. And also the ending where people thought that the divorce scene was unnecessary but it was really important as they should pay for their sins for playing with someone's heart then it doesn't matter what your job is !!

I really enjoyed this drama, if you love JCW then you should definitely give it a try ?