When the Noralty oil company ignores warnings about the dangers in the Colombian border area, eight of its employees (Canadians and one US Navajo) working on a pipeline in Ecuador are kidnapped by the well-organized guerrilla which demands a $20,000,000 ransom, refused by the concern, and forces them deep in the Amazonian jungle where they hide for the army. Forty long days of marching trough this green hell gets the hostages in such bad shape that they must finally be brought into an insurgent camp.