Just when the Soulkeepers think they've established a foothold in the war between Heaven and Hell, the playing field shifts. Enraged by Cord's disappearance, Lucifer replaces his right-hand man with the Wicked Brethren, three Watchers so formidable even their own kind fears them. The Soulkeepers struggle to survive in an increasingly deadly world while continuing to defend human souls. How far will they go when saving the world means sacrificing their most precious team member?