For a couple long, enduring years, monsters have been relentlessly attacking the city of Bifrost. The first attack came two years ago, a siege of pain and blood, and attacks have been coming regularly since, every two weeks. No one knows where the monsters are from, or why they are attacking. Yorktown Engel and Rin Lexington are chosen to scout out the caves in which the monsters emerge and unearth their secrets. They chose to go for each their own reasons: to find a missing sister and to find himself.
This is a new era of battle and strategy. This war is not of men and men. This is of humanity and monstrosity. Together, united, can Yorktown and Rin save Bifrost from the haunting of monsters and bring peace to the world 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.