Princess Jeongmyeong was a Joseon Royal Princess as the only daughter of Seonjo of Joseon and Queen Inmok. She was the older sister of Grand Prince Yeongchang and the wife of Hong Ju-won whom was more younger than her. During her older half-brother, Gwanghaegun of Joseon's reign, she suffered hardships and her title was revoked. But was later reinstated and her title was given back after her half-nephew, Injo of Joseon ascended the throne as the new King to succeeded Gwanghae.
It was also said that her life had been as brittle and unfortunate like her ancestor, Princess Gyeonghye, and her descendant, Princess Deokhye, who were famous for their unfortunate fates as the Princess of Joseon and the Korean Empire.