Eight years ago, Theodore Kirkland died at a banquet; his second daughter-in-law was imprisoned for poisoning. Mason Zane thought the past forgotten, until his son sang a chilling nursery rhyme. It matched murder details: missing mooncakes, the imprisoned “mute,” fingerprints. The cold case reopened, revealing plots by eldest daughter-in-law, Eleanor Chandler. When the rhyme ends, “A girl is buried beneath the moon,” Mason Zane realizes a terrifying secret lies by the osmanthus tree.