Semele Cavnow appraises antiquities for an exclusive Manhattan auction house, specializing in deciphering ancient texts. And when she discovers a manuscript written in the time of Cleopatra, she knows it will be the find of her career. Its author tells the story of a priceless tarot deck, now lost to history, but as Semele delves further she realizes the manuscript is more than it seems. Both a memoir and a prophecy, it appears to be the work of a powerful seer, describing devastating wars and natural disasters in detail thousands of years before they occurred.