Drama series follows the rise and fall of Princess Jeongmyeong. Princess Jeongmyeong was born to King Seongjo of the Joseon Dynasty period. After her younger brother is killed by older stepbrother, Prince Gwanghae, she falls from her position as a princess.

This interpretation tells of Gwanghae as the son of a concubine and secondary heir, who in his thirst for power, usurps the Crown and ousts his half-sister Jungmyung from the palace. Gwanghae is then deposed in a coup by the Westerners, who replace him with Injo. Extremely paranoid and wanting to stabilise his position, he is also out for Jungmyung's life.