After escaping from the alien planet, the ship carrying Ellen Ripley crashes onto a remote so-called prison planet, a place where murderers, rapists and other dregs of society serve their sentence. Ripley discovers the horrifying reason for her crash: An alien stowaway. As the alien matures and begins to kill off the inhabitants, Ripley is unaware that her true enemy is more than just the killer alien. Dozens of unarmed prisoners die in blood fountains. Pieces of human flesh flying in all directions. It seems that no one is able to stop the machinery of death. No one but brave woman named Ripley.