Fourteen-year-old Frank Hollahan moves to Jacksonville, Florida, in 1943, at the height of World War II. A surprising new life awaits him there. When Frank informs everyone at his new school that he saw an enemy spy land on the local beach, no one believes him, but Frank sets out to prove the spy"s existence. The spy who came in from the sea ends up teaching Frank and the people of Jacksonville valuable lessons about friendship, perseverance, and the power of the truth.