Many families sailed to America in the 1800s hoping to find a better life; not many expected that upon their arrival they would be pitted against fellow countrymen in the American Civil War. A Yankeeas Shadow tells the story of two such families who met during a voyage to America. Eleven-year-old Lucas Farrington and six-year-old Meagan Donahue were excited during the crossing until a major epidemic swept through the ship, taking the lives of many. The two went their separate ways when the ship docked in America and a strange twist of fate reunites them on the eve of the Civil War. Although neither recognizes the other, one thing is for certain: she is a stubborn Rebel spying for the Confederacy and he is a damn Yankee commanding a federal navy vessel who, much to her dismay, spends more time on land than at sea. Follow the two, along with their friends and families, through their hardships and joys. Laugh with them, cry with them; rejoice in their good times and mourn during their bad times. Travel with them on the road to Gettysburg.