In the world of Adria, there lies eight civilized kingdoms. Most of the world is tainted by darkness and evil, making travel difficult for the kingdoms. However, there are those in the kingdoms brave enough to travel to the other kingdoms, they are known as the Crimson Legion. They risk their lives on a daily basis, battling the evils that plague the land. In the kingdom of Uena, there is a young boy named named Oliver, who wishes to join the army and defend his kingdom. However, he is in for a lot more than he could have ever imagined.
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.