Immediately follows the events of "Aliens", the military ship USS "Sulaco", carrying the survivors, catches fire. The occupants are ejected in an escape pod, which crash-lands on the refinery/prison planet Fiorina "Fury" 161. All on board except Ripley are killed. An alien facehugger is also aboard, and impregnates an animal with an alien, which soon begins killing inmates and wardens. Ripley discovers an alien queen is growing inside her, and is determined to kill both creatures before Weyland Yutani can exploit them.