With one war on all sides, it's no surprise there's another under our feet. Taurien Macel is the best damn hunter of her generation but the London Underrealm is falling under a growing infestation of Mortalkind's ancient enemy: Demonkind. A war is coming and should the Houses Macel and Ferrigan fall, the last thing standing between a return of the Dark Days and Mortalkind's continuing survival is a bastard, a sea captain and the last heir to the Underrealm throne.