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.
The crew of a colony ship, bound for a remote planet, discover an uncharted paradise with a threat beyond their imagination, and must attempt a harrowing escape.
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.