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.
Returning from LV-426, Ellen Ripley crash-lands on the maximum-security prison Fiorina 161, where she discovers that she has unwittingly brought along an unwelcome visitor.
Two centuries after her death, a powerful human/alien hybrid clone of Ellen Ripley aids a crew of space pirates in stopping the aliens from reaching Earth.