Alien - a perfect body and a perfect killing machine, because it combines physical superiority and unprecedented thirst for destroying all in its path. Officer Ellen Ripley and the crew of the ship "Nostromo" once already had to deal with this creature, after which survived only Ripley. Capsule Ellen rescuers discovered many years later and took her to his ship, which reported that the planet, where the eggs of others were discovered, is now colonized and they sent it back. Ripley tries to explain what they can expect on the planet and to warn of impending danger, but no one takes it seriously. But soon all of them will have a meeting with not one, but thousands of aliens, who are eager only to kill.