The 300 years of peace finally shattered with the appearance of a second opening to Hell, Demon kind once more springs forth to take over the world, but this time it is not one Demon Lord but all of them. Only together, the most powerful humans and familiars can stop the demon lords, however, can the common people stop their armies. With Demon's organized and humans forming their own factions, only time will tell which plane will come out on top, but the total invasion of one world is not without consequences that the demon lords will have to account for when the time of reckoning arrives. In the middle of all this mess, Xero, his family and friends must survive not only the demons but all fellow man as the underbelly of all races begin to show their fangs with the arrival of the demon lords they take as their living gods.