Archivist Claire Reynier may have a priceless find on her hands. A woman named Isabel Santos has discovered a faded document hidden for hundreds of years under the floor of her family's adobe house. It could be the controversial last words of a Jewish mystic condemned to death by the Inquisition in Mexico City. But before Claire can establish the document's authenticity, it disappears, and tragedy visits the Santos family. As Claire searches for the missing paper, she fears that uncovering the history of a dark and dangerous time may bolster her career at the cost of her life.