Two hundred years after Ellen Ripley's death, military scientists on the outer space vessel USM Auriga use her DNA and the Alien queen's DNA to create Ellen Ripley clone who has enhanced strength and reflexes and a psychic link with the Aliens. With a hazard of an Alien attack to the Earth, Ellen Ripley joins a group of mercenaries, military scientist Dr. Wren, a Marine named DiStephano and surviving Alien host Purvis to destroy Auriga to prevent the attack from happening.