When Lieutenant Ellen Ripley awoke from her long journey in space, she discovered the devastating secret that lurks behind her long sleep. When she and fellow veterans Wilks and Billie prepare to meet the Aliens head-on and to turn a powerful Alien queen against her spawn in a battle intended to save Earth, that secret becomes Ripley's greatest weapon--and her greatest liability. As the fate of Earth hangs in the balance, Ripley and Billie must come to terms with what it means to be Alien ... and what it means to be human.