The Big Three: Zeus, Poseidon and Hades. The most powerful gods. Why is that? Their symbols of power. The master bolt, the trident and the helm of darkness allow them superiority over the Olympians, so what happens when those are taken away and entrusted to their children to defeat an old foe that has returned stronger than before? Can the unknown defeat the undying?

How do you prepare for something no one thought possible? How do you predict a catastrophe that should never have happened? Why would you every need to think about killing someone you once knew? Allan is asked the same questions, but he doesn't have any answers. In a country overrun with monsters that never stop hunting, feeding, and growing in population, no one's safe. No one.