Arnold Schwarzenegger stars in this sci-fi action thriller directed by John McTiernan. Major Alan 'Dutch' Schaefer (Schwarzenegger) and a band of mercenaries travel into the Central American jungle to rescue some American hostages from a band of guerrilla fighters. However, they soon discover there is also an extraterrestrial evil force at work in the jungle. As the mercenaries are picked off one by one, Schaefer is left to face the alien predator alone...