Mental illness is never an easy topic to tackle in the world of entertainment so I would like to start off this review by applauding the writer, producers, cast and crew for embarking on difficult journey to tell a story that in essence can be a part torn from real life.

This was a drama that I've watched mostly from in between my tears because it as a very strong emotional tone that sustains the entire plot line. Coupled with the absolutely stunning acting from Ji Sung who interpreted every single alter of Cha Do Hyun with the widest range of emotions and behaviors that you can imagine, you have a story that will completely draw you in and dehydrate you to the maximum from all the tears you will shed.

The entire cast did a very good job but Ji Sung stole the show with his interpretation of all the facets of Cha Do Hyun's personality. While all the alters had distinctive outer features you could recognize them by when they appeared, the masterful acting from Ji Sung resided in his facial expressions. He managed to capture and express the uniqueness of each personality with just his facial expressions and his eyes. I was completely mesmerized with him! I LOVED his acting in Defendant and was expecting nothing less than amazing from him in this series, which is insanely famous for him, but it exceeded my expectations completely! What an actor!!

Hwang Jung Eum did a very good job portraying Oh Ri Jin as well. Albeit some of her behaviors seemed a bit exaggerated in some scenes it does not deter from her beautiful portrayal of emotions that she displays throughout the series. Her crying scenes were so convincing that I could feel tears welling up the moment she got emotional. Well done!

And of course the incredible Park Seo Joon as Oh Ri On, Ri Jin's brother! I'm sure I don't have to say a lot about his excellent acting skills! I especially felt very close to the character he played in this drama. Without spoiling anything he is a very mature, grounded, loving character that you will not be able but love with all your heart.

The plot closely connected to the two main characters is very well done and quite intricate. For a while I could not fully figure out the entire story behind what had transpired in their past to push them to the limits of their sanity but once you get to know everything you understand the tragedy of their childhood and you are hit, like a thousand bricks, with anguish and hopelessness of their childhood years.

However I did duck some points from the drama because I was not satisfied at all with the ending of some of the characters that had a direct or indirect hand in producing the tragedy in our two main leads' lives. I won't say anymore because I don't want to give any spoilers but I feel some characters were either let off the hook too easily or their ending was not presented at all. There was no paying or atonement for what they had done and that's infuriating to me, especially when you experience the immense heartbreak that Cha Do Hyun and Oh Ri Jin went through because of them.

All in all a gorgeous, poignant, incredibly well acted drama that is totally worth seeing and re-watching!