Cal is a carrier without symptoms of a parasite that caused his later girlfriends to become modern day vampires. He hunts these dangerous parasite positives, ‘‘peeps’’ he calls them, for an organization called the Night Watch. But newer victims are showing more sanity, the parasite is evolving. Cal is also receiving pressure from Lacey, a girl who has accidentally become involved. Her apartment building has now become infested unnatural rats, red eyed cats, and monstrous worms that could threaten all of humanity.