There was a reason that people called Andersonville Prison hell on earth. With more than thirty thousand Union soldiers held captive in the worst conditions possible, death and disease were scourges visited on large numbers of them. There was a shortage of food, so it was likely that if the prisoners didn't die of disease, they'd die of starvation -- or the loose cannon of a guard might just decide it was a prisoner's day to die. It was the misfortune of Sergeant John Mulroy to be captured by the Confederate regulars. Sent to Andersonville for the duration of the war, he's certain he'll die if he doesn't find a way to escape. He plans his escape with Cal Blackwood, a Confederate irregular and a disgusted, disgruntled guard. A part of Cal wants to run with Mulroy -- another part wants to make his own flight secure by killing him . . .