A spaceship crashes in the woods of Maine. There seem to be two kinds of aliens. A snake-like creature called a byrus invades the body, lays eggs and seems to feed on human insides. But there is also a higher form that is like a gray mist that can take a humanoid form. A misanthrope prepared to kill all the invaders - and any human who has seen them.
Dead men tell no tales.
All the elements meet in the Maine woods, and the fate of the world may hang in the balance. Not even the survivors are sure what happens. Two of the four original friends who helped save humanity, debriefed by the government after it's all over, aren't sure. Only one question got answered last fall. For centuries, we've looked up at the stars and asked ourselves if we're all alone in the universe.