Ellen Ripley has been through a lot in the course of her encounters with the mysterious xenomorphs she and her Nostromo crew discovered nearly three centuries ago. She's battled soldiers, queens, mutant varieties, and even experienced her own death, but now she's been brought back by a team of scientists hungry to gain access to the alien queen hosted in her body at the time of her demise. Yet something during the cloning process changed her. She now has aspects of the aliens she has so long despised. Acid blood, super strength, adept senses ... is she still even human? But is no time for philosophical debate, because the aliens bred by the queen extracted from her are loose on the research ship USM Auriga, and it's up to Ripley to protect the crew and the whole of Earth from being infested. Once again, it's up to Ellen Ripley to save the day.