In the shadowed heart of the Abyss, where malevolence thrives, Malachai, a demon of the Shadowthorn clan, witnesses his family's sinister rituals. Disgusted by their malevolent legacy, Malachai escapes to the human world, leaving behind the oppressive realm of the Abyss. In his quest for redemption, he adopts the identity of "Shadow Redeemer" and uses his demonic powers to protect humanity.
As Malachai navigates the complexities of the human world, he discovers both the beauty and darkness within mortals. The Shadowthorn clan, led by his father Lord Umbra, pursues him to stop his use of powers for the good of mankind. Alongside the overarching conflict, a chance encounter introduces Lex, a mysterious figure who becomes a pivotal part of Malachai's journey.
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.