Koo Seo-Jin (Hyun-Bin) has two different personalities. One of his personalities is cold like Hyde and the other is sweet like Jekyll.

Koo Seo-Jin (Hyun-Bin) has two different personalities. One of his personalities is cold like Hyde and the other is sweet like Jekyll. He works as the director of theme park Wonderland. Jang Ha-Na (Han Ji-Min) works as the master and actress of a circus at Wonderland. Koo Seo-Jin tries to kick the circus out of Wonderland and Jang Ha-Na reorganizes the circus to stay. In the process, Jang Ha-Na falls in love with Koo Seo-Jin.—kdrama

Koo Seo-Jin (Hyun-Bin) has two different personalities. One of his personalities is cold like Hyde and the other is sweet like Jekyll. He works as the director of theme park Wonderland. Jang Ha-Na (Han Ji-Min) works as the master and actress of a circus at Wonderland..

An importantly placed man with dissociative identity disorder has suppressed his alter ego for five years with immense self-discipline. However, when his psychiatrist who claims to have found his cure goes missing, his other self emerges. It becomes a battle for survival between the man who wishes to become normal and his alternate self, whose desire to live independently only strengthens upon meeting a young woman that holds a key to the psychiatrist's disappearance.—smclayton