In her Grandmother's jewellry shop, sixteen-year-old Oriana Dubois, is aware of something terrible playing out in the shadows. Who are the Order of the Scorpion and what do they want with her? But most of all, what is the significance of the moonstone her grandmother says is Oriana's but which is kept in a locked box? In a journey that winds from the port of La Rochelle to the exotic Ottoman markets of Constantinople, the quest of the Keepers of the Moon will keep you guessing until the very last page.