As civil war between Caesar & Pompey engulfs the Roman world Gordianus the Finder receives an anonymous message informing him of the death of his son Meto who has been acting as a double agent for Caesar. The search for Metos fate brings Gordianus to the besieged seaport of Massilia which is stubbornly holding out against Caesars troops. As famine & slaughter threaten the blockaded city Gordianus is drawn into the intrigues of exiled Romans & duplicitous Massilians. His only friend in the city Hieronymous has been made the doomed scapegoat elected by city officials to bear the sins of the populace & save them all from annihilation. Meanwhile Gordianus is constantly frustrated in his efforts to find out what happened to his son
- & when he witnesses the fall of a young woman from a precipice outside the city called the Sacrifice Rock then the plot begins to thicken...