Sing Sing Prison, New York, July 1916. Charles Frederick Stielow, a 37-year-old farmhand with the mind of an infant, is just minutes away from the electric chair for a double murder he didn't commit. With a vengeful legal system baying for blood, his situation looks hopeless. Eight blocks away, Stielow's wife sobs helplessly in her hotel room, certain she will never see her husband alive again.