It starts off with a relic called The Black Book. It was made by the hands of Oblivion himself to trap gods and immortals. An Adventurer named Rikki, managed to find the portal to Oblivion, and sent out for 3 months of searching. And since in Oblivion, you cannot age or feel hunger for time itself doesn't exist in there. The Infinity Lore Guardian was told to have the Black Book in Oblivion. And so it was true, the Infinity Lore Guardian gave him the book, if he traps Scar, a Demon Death Overlord in the underworld. Rikki agreed and was able to trap him. But that sent him into the dimensional rift, where everything was blank. He then knew that The lore Guardian tricked him into taking the burden of the Black Book. In the dimensional rift, you are alive, but you are nothing. And then He and the Black Book was never heard from ever again...
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.