In the Apocalypse where Eternal Night has fallen, humanity can only cling to survival within the Sanctuary Zones. Young Cain Chandler accidentally awakens the mysterious Sequence Power "000 Devourer Realm", which allows him to devour Abyssal Deities to infinitely strengthen his own power. As he advances, he gradually uncovers the shocking conspiracy of the ruling Seven Great Clans, who use humans as test subjects to feed false gods.