I had a vaguely similar concept for a story. It would basically be the idea of a person being alive who was 100% invincible and immortal. He just woke up one morning and found that he never aged, never got sick, and never had to eat, drink, or sleep. Not only was he invulnerable to harm, but his body actively blocked said harm: a car running him over would hit an invisible wall stronger than any material millimeters from his body, for instance.
It was basically detailing the story of what would happen when this young man discovers that he can essentially do anything he wants without anyone able to stop him, and the reactions of the world to his presence.