Part 1: Andrei Bolkonsky Young Natasha is a child dreaming of romantic affairs. Frequent guest Pierre Bezukhov (Sergei Bondarchuk, the director) takes a serious liking to her, while Russia allies with Austria against Napoleon.
Part 2: Natasha Rostova Natasha's peacetime love affairs, with Andrei & Kuraghin.
Part 3: 1812 Napoleon undertakes a new invasion of Russia, and Andrei once again takes up his sword; includes the Battle of Borodino.
Part 4: Pierre Bezukhov Millions become refugees, as the Russians abandon Moscow and burn their fields behind them.