The film begins in Brienne-le-Château with youthful Napoleon attending military school where he manages a snowball fight like a military campaign, yet he suffers the insults of other boys. It continues a decade later with scenes of the French Revolution and Napoleon's presence at the periphery as a young army lieutenant. He returns to visit his family home in Corsica but politics shift against him and put him in mortal danger. He flees, taking his family to France. Serving as an officer of artillery in the Siege of Toulon, Napoleon's genius for leadership is rewarded with a promotion to brigadier general. Jealous revolutionaries imprison Napoleon but then the political tide turns against the Revolution's own leaders. Napoleon leaves prison, forming plans to invade Italy. He falls in love with the beautiful Joséphine de Beauharnais. The emergency government charges him with the task of protecting the National Assembly. Succeeding in this he is promoted to Commander-in-Chief of the Army of the Interior, and he marries Joséphine. He takes control of the army which protects the French–Italian border, and propels it to victory in an invasion of Italy.