"Dixie Spy" tells the life story of John Edward Henry, a young Midwestern teen that is apprenticed to the town's only doctor to study medicine. He is an atypical farm boy that is raised in the Quaker faith during the time of the war between the North and South. His family has sent him to find an errant younger brother who enlists in the Union army then later, is severely wounded in battle near the nation's capitol. He leaves his medical training and fiancé, promising to return not knowing he will ever see her again. On the way east, our doctor is taken from a train by Jeb Stuarts Calvary to give medical aid for a young rebel officer. He voluntarily commits to be a caregiver for the young relative of Confederate General Robert E. Lee on the journey deep into rebel territory. He is asked by the Confederate command to temporarily serve as a doctor in a rebel army hospital while waiting for an escort back north. He finally wins a release and is escorted north in a magnificent black hearse driven by a rebel spy posing as a mortician delivering a corpse to northern relatives. The trip is fraught with dangers from both armies and desperate deserters.