After an absence of a year, Catherine LeVendeur and her husband Edgar are glad to return to Paris. When they enter the house, however, they discover the body of a Knight Templar hidden away. Although it is obvious that neither Catherine nor Edgar could have had anything to do with it, Catherine lives in dreadful fear. It is only recently that her father Hubert has announced his Jewish roots, and twelfth-century Europe is not a safe place for Jews. The world in general, and one knight named Jehan of Blois in particular, would like nothing better than to pin the murder on any Jew and on Catherine's family especially.