Aglamos is a world existing in central London, hidden from the eye by an invisible barrier. It had been there for thousands of years, divided into four Sections: the Land of Evenys; the Flying Islands of Empyrs; the Sea Caverns of Wulan and the Underworld of Sladdanys.
Those Sections have lived in peace for many years, the people not being afraid to meet each other and fratenize with each other to make mixed races. Most folks didn't mind it, and those who did usually kept it to themselves.
When king Firmis came to the throne of the Underworld of Sladdanys, he ordered that his people who were mixed with another race be executed. Because of that, the queen of the Flying Islands of Empyris sent her daughter, whose father was the late king of Sladdanys, to the human world so that she could have a normal life.
Years later, Firmis discovers a secret about Aglamos only a few chosen know and that sets a plan in his mind.
Aurora's half-human daughter Clara, is propecized to become the saviour of Aglamos by learning how to use her hidden powers and infiltrating the Underworld.
The question is: will she succeed, or will the apocalypse ruin everything and everyone she knows and loves?
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.