The magical seals protecting the city of Sulbreth in the land of Futhark from the demons of the deepest parts of the world are failing. The magically gifted women who guard the seals, the Keepers, scurry to secure the weakened magic before their city and eventually the entire world is over run. But all is not as it seems. Their very understanding of their mission and their life's work is called into question.

Cage Stone enters Sulbreth in a bid to win a tournament to protect his odd little family. He never expects to become embroiled in the threat of the world's end.

The Keepers need Cage Stone, but can they convince him to give up all he knows and join their cause? Can he face and accept the secrets he's kept buried for so long or will he deny his heritage and destiny until it is too late.

Man is not the top predator in Futhark. It will take every bit of cunning, courage and sacrifice the people are capable of as they face an enemy not seen in this world for thousands of years.