Set during the reign of King Sukjong in the Joseon dynasty, the story focuses on Dong Yi, a water maid who gains the trust of Queen Inhyeon and later the favour of the king when he is moved by her prayers for the health of the Queen during the court disputes caused by Jang Hee Bin. Dong Yi becomes a concubine with the rank of sook-bin and bears a son who will later become the 21st king of Joseon, Yeongjo.
as Dong Yi
as Queen Inhyeon
as Oh Tae-suk
as King Sukjong
as Jang Hee-Bin
as Cha Jeon-Soo
as Dong Yi (young)
as Yeong-dal
as Shim Woon-taek
as Ge Dwo-ra
as Queen Inwon
as Oh Yun
as Prince Eunpyeong
as Jung Eum
as Cha Soo-taek
as [Servant]
as Queen Myeongseong
as Hong Tae-yoon
