An otherworldly, evil and dangerous force infests America's oldest and most haunted city, St. Augustine, Florida. Everyone living there, or visiting, is at risk in ways too horrible to imagine. Standing between this invader and the people of St. Augustine are teenagers Jeff and Carla, the mysterious Native American shaman, Lobo, and Lyle, the homeless guy. In their quest to save themselves and all the inhabitants of this ancient Florida city, Jeff and Carla uncover lost parts of St. Augustine history, push past the limits of space and time, and come face-to-face with what they come to realize are the true walking dead.