This is amazing drama. Honestly, I watched the first episode a time ago, then I stopped because I was just a little confused. But, I'm determined, so I gave it a try again, mainly because of the plot and Jang Ki-Yong. And I don't regret it! The plot is about revenge, but it also presents topics such as child exploitation in a disturbing and interesting way. The filmography is impeccable, the performances are consistent with the characters. A little cliché, but in a new way. Although the ending made me very sad, I believed it was the best. I'll watch again for sure.