57 years after Ellen Ripley survived an an encounter with an unknown alien lifeform that slaughtered her ship-mates abord the interstellar cargo ship Nostromo, she is discovered and revived from hypersleep to discover that her claims of a "xenomorph" are not only disbelieved, but considered pure fantasy. A few weeks later, events on the planet that she had visited before cause her former employers, "Wayland Yutani", to request her to accompany a squad of Colonial Marines back to the windblown hell known as LV-426. What she and the Colonial Marines find there is unbelievably terrifying...