The Mancers' Guild House has fallen. A city lies in ruins. In the aftermath of destruction, the Mancers struggle to rebuild their numbers while the Monster of Menie schemes.

Though Ba'tvian Delthanurk hunts them, Mancers must still heed their sworn duties. Responding to a call from the Rathburn Watch, one of their number returns to the city he once called home. A murderer is stalking the city of Rathurn, leaving mutilated bodies in his decade-long wake. The Watch suspect a local; the Mancer Veln Greenmeadow suspects a blood mage.

As Veln searches for the truth in Rathburn, Absol Omine prepares his people as best he can. Time is running out as Ba'tvian and his Shadowed Ones close in on Destiny's Way. Absol's hope lies in the boy he's raised, one whose power may be equal to the blood mage Delthanurk's. While the Mancers plan, the elven lady Nerisse se li Astorae enacts a scheme of her lord's making. Every step she takes is haunted by what she's done. As she tries to separate the madness she fears from the reality around her, Nerisse struggles for reprieve.

One will lose all sense of self. Another will perish in failure. And the Monster of Menie will lay the foundation of new a future.

Descent Into Darkness: His Revenge is part five of the novella series.