The S Memorial. Completed 2 months after the battle known as "Hell's War", when the Nexions, creatures that exist in the Nexus and feed off of human souls, crossed over into our world. The world government tried to dedicate all resources to finding a way to battle the Nexions, but all was for naught. Then, a mysterious group appeared out of nowhere and crushed the Nexions with something called an "X Field". Their power was god-like, along with their appearances. Now, "X Field" has not been discovered yet, but now, all of humanity lives on the final stronghold - Avalon.
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.