Zombies have appeared and humanity is failing, until we get some help from a very unexpected source, long thought to be merely the stuff of folk tales: the vampires. Revealing themselves en masse worldwide, they join our side. With their help, humanity at last stands a fighting chance for survival. We don't know why the Vampires are helping us until a second-act reveal shocks us with the origin of Zombie Zero, whose mindless bite first began spreading the degenerate strain. But just as it seems like humanity might win, we discover even as society was crumbling, elements of the U.S. Army began experiments in weaponizing... The Bite. Army-branded pseudo-zombies have broken loose: and unlike the ones we were originally fighting, these ones think. These ones work in squads. These ones answer only to The General.