He's maladjusted. He has an attitude. And once, the village priest tells him, he was a Jew.
When a survivor of the First Crusade persuades Martin to explore his heritage, Martin has no idea what he's in for. It's nothing like what he imagined, and it's hard work. And across the Golden Horn lies Constantinople, the most exciting city in the world. Why should Martin stick it out in the Jewish community?
Through the choices he makes, Martin begins to understand relationships and responsibility, people and societies, and develops a commitment to a Jewish life.