Nguyễn Đình Chính

A scientist dies while researching the toxins dropped by American bombers onto Southern Vietnam. His three students goes on a trip through the forest of Truong Son mountains to bring his remains and research documents back to the North, but soon find themselves developing the same symptoms like their professor.

An ex-fighter pilot renounces life and becomes a monk to seek salvation after the tragic death of his wife upon giving birth to a malformed fetus, which he blames on his mysterious illness. One day, a friend in combat visits him and sheds light on his miseries.