In March 1847, eight thousand soldiers land on the beaches of Vera Cruz, led by the army's commanding general, Winfield Scott—a heroic veteran of the War of 1812, short-tempered, vain and nostalgic for the glories of his youth. At his right hand is Robert E. Lee, a forty-year-old engineer, a dignified, serious man who has never seen combat.

Scott leads his troops agaainst the imperious Mexican dictator General Atonio Lopez de Santa Ana, who arroganatly underestimates Scott and his army. The Americans soon learn about their enemy and themselves, as young men witness for the first time the horror of war. And while Scott weighs his own place in history, Lee the engineer becomes Lee the hero, the one man in Scott's command whose extraordinary destiny as a soldier is clear.