A Greek artisan is commissioned to cast the cup of Christ in silver and sculpt around its rim the faces of the disciples and Jesus himself. He travels to Jerusalem and eventually to Rome to complete the task. Meanwhile, a nefarious interloper is trying to convince the crowds that he is the new Messiah by using nothing more than cheap parlor tricks.
In the 13th century, Walter of Gurnie, a disinherited Saxon youth, is forced to flee England. With his friend, Tristram, he falls in with the army of the fierce but avuncular General Bayan, and journeys all the way to China, where both men become involved in intrigues in the court of Kublai Khan.
