I think the overall theme for this drama is "What are you willing to do to get justice? What lines will you cross to get your revenge? How far are you letting your grief drive you?" And in that way the drama tells a phenomenal story. Although I wasn't hooked by its first episodes right away, I grew to love it to bits even though the basic summary doesn't differ much from other revenge dramas. What makes this so special are its characters and the construction of their stories - and the bond between them. Like the plot is built up in layers, so are its partakers. Every detail is played out so well that you're stunned when you reminisce about it. It makes you excited to watch each twist unfold, to guess and to see whether your predictions come true or not. And it never lets you rest. Each turn of events is shocking, moves you to tears or riles up your emotions to an unknown degree. What I loved so much in the acting of the characters were those subtle, tiny expressions, almost too small to notice but you DO notice them. There is no one who is truly good or bad. Everyone has their flaws and inner fights and struggles, and sometimes the selfish desire wins over. It shows how good this drama is, that it makes you focus automatically, so you won't miss anything. One big strength of this drama is that it makes you try to imagine to be in their shoes. You might think that you will never extort to their lengths and methods but deep down you have to admit that you can't be hundred percent clear about that either. Human instincts are one big mystery and only if you face such situations yourself, you'll learn some new truths about yourself. Thinking of the cast makes me seriously happy because everyone, and I mean everyone, did such a good job with each and every role they were given. It made you enjoy all their interactions, either good or bad. A big shout-out at the young teenage actors, too, because they were utterly amazing! Also one of the best villains I've seen in a drama. I always prefer the calm, smart ones over the impulsive stereotypes they use so often. And Lookout has one intriguing badass whose gaze gives you the chills because he's just so incalculable. He's like fog where you can't see far enough. Though all of them were amazing, the one who gets the biggest bouquet of flowers is Kim Young Kwang. He is simply surpassing every role he's done so far. His character was so well written and his performance was mind-blowing. And I'm not even exaggerating. He played Jang Do Han with such perfection and perception that I can't wait to see more of his acting in future roles with likewise impressive characters. I don't even want to talk about this too much, just watch it yourself and let yourself be mesmerized. Also, Lee Shi Young. I was five minutes into the drama, and she already knocked me off my socks. She's such a badass female lead who makes you root for her almost all the way through. She is strong and no matter what happens stays to her beliefs. And although it might become a lonely fight, she never willingly depends on others but takes matters in her own hand. I did have some issues with the last episodes which is why I can't give this drama a full 10. But I was still very satisfied with its wrap up, and to know that it's over now, makes me shed a tear or two.