The war between the human nations of Morenne and Edrinor has been ongoing for decades.
The war between demons and mages, centuries. The war among the gods, millennia.
For Korsten Brierly, life already seemed complicated enough. Disinherited from a young age, helping to govern a town of strategic significance to warring countries, keeping his affair with the local governor's son a secret....
When a demon hunting mage arrives at his doorstep at the same time gruesome murders begin, Korsten finds himself quickly swept away by a tide of events and discoveries beyond his darkest dreams. Caught up in a war much deeper and far more dangerous than he ever would have believed it to be, Korsten is forced to abandon the life he knew and everyone in it. Summoned to a duty that terrifies him, by powers he can't ignore, he begins a journey into understanding his own soul and how to protect the souls of others from demons bent on possessing, poisoning, and devouring them through methods that are gradually decaying the world they live in. Struggling to stay afloat in a maelstrom of ancient forces, his own emotions, and dangerous political games, Korsten commits himself to the task, for the sake of his soul and his sanity, and for the sake of the lover he was not supposed to have...a man possessed by ambition and by a demon with goals of its own.
It has been less than a year since Korsten's return from a Morennish prison tower. The ongoing war with men as well as with demons affords no rest for the mages, and he and Merran are once again out in the field, hunting what hunts for the blood and souls of human beings. Their search takes them to the coastal city of Indhovan, where other mages are at work on political maneuvers that may officially ally the strategically vital city with the Old Kingdom. But there are several forces at work within the city, where an aging governor grows weary of war and where political and magical factions vie for the upper hand in what's to come.
Korsten washes up on the shores of his childhood home, where he discovers that his past may well have been designed by the demon responsible for Haddowyn’s dark fate, and for leading Morenne in the war against Edrinor. While he explores what has been so long forgotten, the enemy invades Indhovan, bringing with it destructive new weapons. In Vassenleigh, the Mage-Superiors unlock a long-protected secret that could change the Spectrum of magic as their world knows it. Korsten’s own path to discovery could help him to understand his relationship to Song and to truly master the Siren spell in the interest of protecting Edrinor, but it could also lead to the darkest era their world will ever know.