These are dark times in Quaymet, brought on by the discovery of light - namely, a new power source, Solarium. But where do the elements of this boon to civilization come from? And who's directing how it's sold and used? Emile meets the ally - or is it enemy? - of a lifetime, a Man of Power who killed Song's father and now seems intent on killing him. Soon, Song and Henchard are drawn into a battle even they may not survive, as they go up against an empire that's being consumed by an ancient evil.