Revenge - in one word we can sum up all the moves of the main character.
Han So Hee perfectly played the role of a small, weak girl who under the supervision of the mafia boss undergoes an extraordinary transformation and turns into a real tough girl. This character will stay in my memory as one of the really well played ones.
Park Hee Soon as Choi Moo Jin is an amazing combination. I love him in this role. And the chemistry that develops between him and Oh Hye Jin is something that keeps the viewer hooked.
I think the series is amazing. Gangster cinema at its best. It keeps you in suspense, shows the brutal life of the mafia underworld and in all that, the girl's struggle to get to the truth. The series has been keeping me awake for over three weeks now. I will definitely revisit it.

But one detail puzzles me. That chemistry between Oh Hye Jin and Choi Moo Jin. The whole team gave us a glimpse of something wonderful. The way they play off each other on screen, the subtleties mixed with brutality. And the ending itself, something so real. Different from all the "happy endings" we get from Americans for example.