Growing up on the moon, Xingyin is accustomed to solitude, unaware that she is being hidden from the feared Celesial Emperor who exiled her mother for stealing the elixer of immortality. But when Xingyin's magic flares and her existence is discovered, she is forced to flee her home, leaving her mother behind. Alone, powerless, and afraid, she makes her way to the Celestial Kingdom, a land of wonder and secrets. Disguising her identity, she seizes an opportunity to train alongside the emperor's son, mastering archery and magic, even as passion flames between her and the prince. To save her mother, Xingyin embarks on a perilous quest, confronting legendar creatures and vicious enemies. However, when treachery looms and forbidden magic threatens the kingdom, she must challenge the ruthless Celestial Emperor for her dream - striking a dangerous bargain in which she is torn between losing all she loves and plunging the realm into chaos.