Thousands of years from now, in a world lightyears away from us, gods and magic exist.
The land of Instopia is lorded over by a ruthless and powerful god, and every year, the people of Instopia must sacrifice a human on the winter solstice to appease the god, and if they do not, their land will be torn apart by the god's fury. This year, it is Orion DeFay's turn.
But a secret organisation is determined to stop these barbaric actions, and they believe that Orion will be the key to abolish the sacrifices once and for all.
The only thing is, the god isn't about to let that happen.
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.