The Gates of Hell have opened. The earth is in ruin. The angels have abandoned humanity. Our final hope was created behind the wall. We are Nephilim. We will fight the demons and the Princes of Hell, or we will surrender our last breaths trying. Twenty-one years ago, the world ended. The Gates to Hell opened, unleashing every species of demon and monster known to man, and some yet to be discovered. Aside from a warning about the impending Armageddon a few months before, the angels abandoned humanity, leaving us to hide or die. Spoiler alert: most died. That's the apocalypse for you. It tends to be, shall we say, awful. Humans moved into strongholds built around the globe in an attempt to survive extinction. Within these walls, scientists developed genetically engineered Nephilim--half-human, half-angel--to fight the demons. My name is Zero, and I'm a Nephilim, but I'm a little...odd. Let's start with the little fact I can't stay dead. Shoot me, maim me, dismember me, disembowel me--don't recommend that one personally, it reeks--whatever death you deal me, I'll come back. I also have this thing where I can turn into a Beast and may or may not eat people. Only if they deserve it, though. Howl is the leader of the Wolf Unit, the strongest group of Nephilim humanity has ever seen. Though we were once friends, he and I now despise each other, which is fantastic when I'm finally allowed to join a Unit and fate takes a wicked turn in pairing the stone-cold Wolf Alpha and my stubborn self together on the same team. I guess we'll have to work with each other, and maybe I can figure out what went wrong between us in the first place. Will it be enough by the time the Princes of Hell spring up and start destroying entire cities? For two decades, we've been told that Hellfire is our only hope. We need to find it, or face mass extinction at the hands of the seven fallen angels of legend. But with lies around every turn, mysteries shrouded in half-truths, catastrophic situations being played down on a global scale, and those closest to me being evil in disguise, who can I really trust? We survived the Rise. Now, can we see it through to the Fall?