Accomplishing the impossible, Gideon steals the parchment--only to learn that hidden beneath the gorgeously illuminated image is a treasure map dating back to the time of the ancient Greeks. As they ponder the strange map, they realize that the treasure it leads to is no ordinary fortune. It is something far more precious: an amazing discovery that could perhaps even save Gideon's life.

Together with his new partner, Amy, Gideon follows a trail of cryptic clues to an unknown island in a remote corner of the Caribbean Sea. There, off the hostile and desolate Mosquito Coast, the pair realize the extraordinary treasure they are hunting conceals an even greater shock-a revelation so profound that it may benefit the entire human race . . . if Gideon and Amy can survive.