Fear what lurks in the shadows.
The desolate streets of downtown Pittsburgh are a constant reminder of the missile attack that forever changed the lives of the surviving scientists and students in the fallout shelter of Helmsby's Genetic Research Center. Believing themselves to be the only survivors, they station themselves inside the center until food supplies near depletion. Thinking the fallout has lessened, they emerge three years later to discover strange predatory creatures lurking in the shadows in search of human flesh and blood. The creatures possess the ability to shift their genomes and alter their appearances by realigning their genetic sequences.
Daniel Hutchinson and Lucas Ridale leave the safety of the research center to scavenge the area for food and survivors with the hope of finding other survivors. But Daniel's most recent journey uncovers mysteries far more frightening than shifters. He discovers the tip of Pittsburgh has been fenced off from the rest of the city. Low-flying helicopters observe the streets, making him wonder if the shifters were released as part of a military experiment with humans being their prey.