A mentally unstable veteran works as a nighttime taxi driver in New York City, where the perceived decadence and sleaze fuels his urge for violent action.
Decades after surviving the Nostromo incident, Ellen Ripley is sent out to re-establish contact with a terraforming colony but finds herself battling the Alien Queen and her offspring.
When strange seeds drift to earth from space, mysterious pods begin to grow and invade San Francisco, replicating the city's residents one body at a time.