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.
| Actor | Role |
|---|---|
 Phương ThanhLiễu | Liễu |
 Đặng Lưu Việt BảoBiên | Biên |
 Lý HuỳnhĐại uý Tường | Đại uý Tường |
 Trần Trung NhànHải | Hải |
| BBích LiênHà | Hà |