In the future world, humans can easily travel between stars and conduct commercial activities in space. "Nostromo" is one of the many interstellar commercial transport ships active in space. Once, when it completed its mission and returned to Earth with a full load of space ore, it suddenly received a set of strange signals. Since this might be a distress signal, the spacecraft received an order to go to the source of the signal for search and rescue. After a period of flight, the spacecraft finally arrived at the source of the signal. The crew found that there was indeed a crashed spacecraft here, but after a search, they found that the crew of the ship had already died and turned into fossils. At this time, Ripley, the third commander who stayed on the "Nostromo", had deciphered that the signal was not a distress signal, but a warning signal! The life-and-death struggle of the team members began!