Jang Ha Na works at a circus inside an amusement park, of which Goo Seo Jin is the CEO. Goo Seo Jin is a third-generation chaebol who, due to childhood trauma, suffers from dissociative identity disorder.
When Seo Jin decides to remove the circus from the amusement park, Ha Na objects, finding herself confronted by both of Seo Jin’s personalities: the cold and cynical Jekyll and the sweet and naive Hyde… giving rise to a rather unusual “love triangle”.