When Caroline learns that British spies may be lurking in Sackets Harbor, she is worried. Then, a long lost friend of Papa's shows up in town. Papa is delighted to give him a job at Abbott's Shipyard, but soon, strange things start going wrong. Caroline is sure a spy is making trouble at the yard ? but is it one of Abbott's trusted workers, whom she has known all her life, or could it be Papa's dear friend? An illustrated "Looking Back" section discuses the role of spies in the War of 1812.