The Holy Land in the 12th century. In a mysterious way, young Arab girls are disappearing. All were orphans and had the same symbol tattooed: the Hand of Fatima. At the same time, Duke Milon de Plancy is treacherously murdered by four masked men. But this is just the beginning of a series of murders connected to mysterious writings, the revelation of which could herald the end of free Jerusalem and even make holy Rome tremble. Together with the young King of Jerusalem, Archdeacon William of Tyre sets out to shed light on the murderous conspiracy.