Growing up on the moon, Xingyin is accustomed to solitude, unaware that she is being hidden from the feared Celestial Emperor who exiled her mother for stealing his elixir 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 learn alongside the emperor's son,