Fourteen-year-old Billy Harriman can feel the changes: the sharpening of his senses, the incredible strength, and the confidence and the strange need to patrol Central Park at night. His dad had been a hero, the savior of America. Then he died, and the changes began in Billy. What Billy never knew was that his father was no ordinary man. He was a superhero, battling the world's evil. This is a battle that has been waged for generations and that knows no boundaries.