The story takes place at the beginning of the 19th century. Goo Hae-Ryung is a historian who tries to fight gender stereotypes as her work is often looked down on. She meets Prince Yi Rim.
as Goo Hae-Ryung / Hui Yeon
as Prince Yi Rim / Maehwa / Prince Dowon
as Lee Jin
as Min Woo-Won
as Song Sa-Hee
as Goo Jae-Kyung
as Lee Tae
as Min Ik-Pyeong
as Mo-hwa
as Second Vice-Premier
as Kim Chi-gook
