Lee Byung-hoon

About 500 years ago during the time of Chosun Dynasty, Korea boasted a rigidly hierarchical and male dominated social structure. Based on a true story about a legendary girl, Jang Geum, who became the first woman to be the supreme royal physician of her times. Despite her poor condition as a low class girl in the male dominated society, Jang Geum overcame a series of social discrimination and landed herself as a... (mydramalist.com)

Story a simple maid that rises high in the royal harem as a consort and, ultimately, mother of the Korean king. (imdb)

Yi San dramatizes the life of Korea's King Jeongjo, the 22nd ruler of the Joseon Dynasty. Jeongjo is remembered in Korean history for his sympathy with the harsh conditions his people had to deal with, in spite of his own pampered upbringing as royalty. He instituted many reforms to improve their conditions. (imdb)

In the Joseon Dynasty era, Ok-Nyeo was born in prison. She belongs to weji-boo which helps people in the realm of law.