The story revolves around a simple girl from a peasant family who was born on the night when the eighth star appeared in the constellation of the Big Dipper. Upon reaching adulthood, she learns about an ancient prophecy: a child born during such a rare celestial event must save the kingdom of Silla and overthrow the unlawfully reigning ruler, Queen Mi-sil. The girl realizes that she is the one mentioned in the prophecy and begins to fight for power. She becomes the Queen Seondeok.