Dubbed as the 'jewel girl' due to her extraordinary talent, Azusa is a rare survivor of her lineage, capable of transforming flora into valuable gems based on her emotional state. Imprisoned and compelled to serve a noble for a decade, she finds solace in the gentle presence of the Lord's benevolent second son. However, when the young man vanishes unexpectedly, Azusa's powers wane. Determined to locate him, she flees and crosses paths with Monji, a cunning young thief who proposes a peculiar arrangement.