In which the children, alongside Lord Yalding and the devoted Mademoiselle, confront the puzzling magic of a mysterious ring that reveals hidden treasures and stirs bewilderment, weaving moments of enchantment and heartfelt emotion within the ancient halls and moonlit stones. They gather beneath a rising moon where timeless light uncovers deeper truths, altering lives and leaving an unforgettable sense of wonder that lingers beyond the magical night.