Dark Nation is the third in the Vampire War series. The DSA task force has remained inactive for several months. Meanwhile, the Corruptor has taken control of the government and military. The military has begun sweeping the nation to turn citizens into vampires or inter them in "blood farms" as cattle to produce food for the vampires.
A vision received by the shaman of the lycanthrope tribe harboring the remains of the task force sends the Nemesis, Alex Chance, and a few others on a quest to find the power that will signal the end of the vampire reign. Along the way, they encounter a group of refugees and the protected city of Sanctuary. It is there that the first battle of the Vampire War will take place.