The plot twist.... damn, it shook me up too hard. I never would have expected that. The entire drama kept me on my toes for every episode, it was hard for me to look away from the screen. The plot was amazing, to be honest when i saw the episode that revealed stuff my breath got stuck in my throat it was too unexpected. I found it beautifully portrayed and all the actors depicted their characters so well that it was hard to guess what the truth would have been. I specially loved the character of Yoo Si Joon, I have no words for the character, the bond between the siblings, the reliance upon each other and of course the unexpected part.