Four unfortunate men from different parts of the globe agree to risk their lives transporting gallons of nitroglycerin across dangerous South American jungle. A group of outcasts from different backgrounds and nationalities are forced by misfortune to work in an oil-drilling operation in South America. When fire breaks out of control, four of the outcasts are given the opportunity to earn enough money to get out by transporting six crates of unstable dynamite through miles of jungle in two ancient trucks.