One half-breed elf and a barely trained sorceress have the fate of the world depending on their rare abilities. But someone or something wants to stop them. The Keepers use magic to hold a world of evil from the surface of the land of humans. Keeper Sabelline Shelton needs the best swordsman in the land to guard her on her mission to reset the magical seals located deep beneath the mountains surrounding the island kingdom. Fortunately for her, Cage Stone is such a man. After he's tricked into joining the cause of the witches and the king of Futhark, Cage realizes if Sabelline doesn't succeed the world of men could end. But forces beyond the understanding of the Keepers work to make sure Sabelline fails.

Men filled with greed and ignorance hinder the efforts of the king while the supernatural creatures test the weakening gate between their world and the surface. Fell beasts attack, targeting Sabelline and the young king. Cage and the other Marshals trained to fight the monsters stand between the city of Sulbreth and the tide of evil swelling ever closer.

Mere swords can do little against the other-worldly host and only by accepting his heritage can Cage hope to stop them. Secrets from Cage's past have long haunted him. All his life he's hidden and suppressed all the things that make him different from other men. Now he must not only accept all his special qualities, he must use every bit of his secret elvish blood to fight against the enemies of all living creatures. But not even the most learned of the Keepers know what exactly they face as each hour brings a new crisis. Can Cage's instincts and skills with weapons be enough to protect Sabelline and put the lid back on the cauldron of hades before it boils over into Futhark?