Xingyin is the daughter of a goddess sentenced by the Heavenly Emperor to eternal imprisonment on the Moon. Xingyin's very existence must remain a secret, and when the girl's magic causes changes in the Moon's aura, she is forced to flee home, promising to one day free her mother as well. She ends up in the Heavenly Empire, where she studies martial arts with the crown prince, so unlike her father. Hoping to earn the emperor's favor for the Moon Goddess, Xingyin embarks on a journey across the earth and sky, encountering legendary monsters and ancient dragons. But when forbidden magic plunges the empire into chaos, the daughter of the Moon Goddess makes a dangerous deal, risking losing everything she holds dear.