In , Kristin Cast introduced her legions of readers to Alek and Eva. Alek, immortal son of the Furies, has been charged to save his home and recapture the souls of the damned, evil creatures who escaped Tartarus into the Mortal Realm. He can't, however, do it alone... Eva has discovered that she has been both blessed and cursed with powers beyond her comprehension. With a destiny to fulfill, she cannot escape the beings who will stop at nothing to destroy her. Now, in , the Nosoi—spirits of plague—have been unleashed on the Mortal Realm, releasing a pandemic as clever and adaptable as it is insidious. Alek and Eva must capture and banish the Nosoi back to their Underworld prison—but Eva has yet to harness the abilities needed to defeat such a powerful enemy, and Alek sustains catastrophic wounds in the attempt. They must rely on detective James Graham, and Eva’s best friend Bridget, if they are to even slow down the plague. But can mere mortals come through in the face of such overwhelming peril?