In an hour of danger, Dr Hunter McGuire, a surgeon in the Confederate Army of Stonewall Jackson, made a fateful decision. Today's Cavalcade tells the dramatic story of Dr McGuire's heroic choice. It began in 1862, and the exhausted battle-smeared army are sleeping when a messenger brings word to Dr McGuire that his sister is dying. He makes the decision to go to her - but she's over the Yankee lines, and he'll need to get through the lines, and back again, before the Confederates attack the Yankees in six days time...