In the Beinecke Rare Book and Manuscript Library of Yale University there lies a 400-year-old document that no one has been able to decipher. Twenty years ago the Vatican's Congregation for the Doctrine of the Faith secretly placed a guard to watch over the document. The guard, Father Ronald McCallum, is overwhelmed when an autistic child visiting the library appears to read from the manuscript's pages. Finally its secrets will be revealed! Father Benicio Valori, priest and clinical psychologist, is sent halfway around the world to verify the boy's ability to read the manuscript . When the manuscript is stolen, things begin to unravel.