Major Dutch Schaefer (Arnold Schwarzenegger) is the leader of a military rescue unit looking for allies captured by guerrillas in the Latin American jungle. At first it seems like any other mission: Schaefer and his team of seasoned combat veterans spot a guerilla camp, destroy it, and find the men they were sent to rescue executed. But when Schaefer attempts to lead his unit out, with a captured guerrilla in tow, something horrifying and inexplicable begins to happen: One by one the men are killed by a mysterious adversary - a Predator from another world.