In 363, somewhere in Mesopotamia, on a campaign against the Persians, the emperor Julian, who had succeeded Constantine after his victory over Gaul, was going through a personal crisis. He sees that the new philosophical trend, Christianity, is as cruel and implacable as the old paganism, and so he returns to the ancient philosophers. He knows that, as a potentate, he is surrounded by a pack of careerists who are all about loot, and in the face of an insidious external enemy. But his future fate is in their hands...