Communist guerrillas launch a surprise attack: the Tet Offensive. Americans in the city of Huế find themselves at the center of a bloody battle.

In 1965, America sends young soldiers to war in a country they know nothing about. Two tunnel rats form a powerful bond, until one is gravely injured.

A Vietnamese child's life is torn apart by the war, and a pilot is shot down in enemy territory. Back in the U.S., social unrest takes hold.

Soldiers return to a divided America and must come to terms with how the war changed them. Differing beliefs create a rift between best friends.

Ten years later, in 1975, the remaining Americans and fleeing South Vietnamese race against time to escape in the largest helicopter evacuation ever.

With victory no closer, American soldiers begin to lose faith. A nurse wrestles with how to protect her patients, and a wife receives dreadful news.