There is no escaping the evil lurking in the shadows ...

After the harrowing trials of Emergence, Jed Welch finds himself alone in the ruins of New York City. But not all is lost.

USMC Staff Sergeant Alexandra Gallegos and the two surviving members of her platoon find Jed, and together they will bring the full weight of their Marine Corps training, and mission-driven sense of vengeance, to bear upon the real monsters: human collaborators who aid the Variants at the expense of their fellow human beings.

For SSGT Gallegos, theirs is a mission borne of duty and command. For Jed, it becomes an act of penance, in hopes he may atone for his sins.