Vastra is a man possessed. Where other men require food to sustain them, his craving is for power. He seeks an Eldric talisman, ensnaring two men to aid him. Fate guides his hand and, unwittingly, he chooses Kaplyn, who is seeking to escape his own destiny and Lars, shipwrecked and friendless, an outcast on the Allund shore. An unlikely trio, they form a fragile alliance but, recklessly ambitious, Vastra will betray them in a heartbeat.
Throughout their travels, there are clear signs that demons are active, stealing souls to slake their hunger. Their journey takes them to a mysterious tower, beset by traps, where Kaplyn triggers a chain of events unleashing the full power of a prophecy that could doom them all. Deep in the heart of a mountain lays a power that not even Vastra has the audacity to envision. But who really is guiding Vastra's destiny? Kaplyn has the talisman and, for all of Vastra's threats, he is unwilling to part with it.