This storyline is interesting. The fantasy that can actually be our future with human brains excelling every day in science engineering. Jo Seung Woo playing the character of Han Tae Sul played his character to the fullest. Park Shin Hye is a great actress, when she takes on a character such as Kang Seo Hae, she merges it with her own persona. This drama has its twists and tricks and if anyone watches it needs to pay attention to the storyline. You can't miss one episode or it will throw you off. It's a good thing that the episodes are all complete. The visuals are phenomenal when it comes to the storyline. It has its ups and downs but at the end of the drama... well you have to see it to believe it. Keep your eye on Chae Jong Hyeop, he is such a cutie who plays the character, Choi Jae Su!