While on an archaeological dig in Northern Arizona, Marcus Machado unearths the journals of a sixteenth century priest. The contents make reference to the existence of the Book of Aaron, a missing book of the Bible. It also suggests a possible location of the book along the Exodus Trail in the Middle East. Marc travels to another dig site in the Middle Eastern desert where, along with the help of an Egyptian guide, they uncover the actual Book of Aaron, the brother of Moses. The book reveals an even greater secret-the existence of an eleventh commandment. They soon discover the fabled tablet and after deciphering accompanying information about the commandment. Marcus is torn between delivering it to the world and burying it deeper than where he found it. He knows that in the wrong hands, it could have earth-shattering ramifications. Follow along as Marc deals with the dilemma thrust upon him.