This is the story of Su Baek-hyang, born as the elder daughter of King Mu-ryeong but unable to retain her title of princess due to her ambitious younger sister, Sol-hui. Humble and hard-working, she was taught never to want or to desire beyond what she has, but the fate given to her is one that will affect not only her life and her family's lives, but the entire nation as she struggles to find her place in life and fight for love.
King Mu Ryeong was a Baekje king who oversaw a renaissance during his reign while also building his kingdom into a sea power. He had a hidden daughter called Soo Baek Hyang, who did not become a princess due to her evil half-sister, Seol Hee. But Baek Hyang showed deep filial piety to her father and was patriotic. She later became the leader of Bimun, a secret spy group that helped her country in war. She earned eternal recognition in the annals of Baekje history.