Mid-1960s in North Vietnam, in an area near the border with Laos. It tells the story of Vietnamese patriots fighting for their country's independence. The Americans land troops in the border area where the Mao people live. Among the paratroopers were people from those areas who had once left their homeland and gone with the French troops. The aggressors wanted to use provocations to win over most of the local population and, with their help, capture the border areas. But they miscalculated. The local population helped the border guards capture the paratroopers.