Menjelang usia 16 tahun, Aizat tiba-tiba memiliki sebuah kuasa yang membolehkan dia menjadi halimunan. Dengan kuasa yang dia miliki, segala fantasinya kini di dalam genggaman.
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.