The movie could start with a much older Deckard ( the human version of course ) coaxed out of his isolated and dreary existence, to once again, hunt down replicants. He would rather shoot himself in the head than go on this mission, especially because of what happened 9 years ago when they caught him and Rachel and she was killed. But he relented after they showed him a chip with Rachel’s memories in it. In short, if he agrees, they will reconstruct Rachel, memories and all.
There wasn’t suppose to be anymore replicant trouble. The newer ones were reconfigured to automatically self-destruct when an “anomaly” occurs. The anomaly being disobedient to orders and of course, harming humans. Now, a group of these new breed of more powerful and sophisticated replicants managed once again to penetrate human civilization and hide.
When one of them got cornered by six young bladerunners, it detonated, but what was suppose to be a minor explosion, ended up in a big one powerful enough to destroy a whole city block! And so enter Deckard. They not only need his skills in tracking replicants but his experience and unique insight with having a relationship with one.
When Deckard saw Rachel once more, he felt he had a reason to live again. He quickly set-out to hunt down the replicants and in spite of being annoyed with the other Bladerunners and despite his age, he managed to kill two without a single deadly explosion.
But then it got harder. The next replicants to be hunted are harder to kill. Later on, it was revealed that these group of replicants has an orbiting spaceship that when detonated is powerful enough to wipe out half of Earth’s population.
The replicants managed to kidnap Rachel. To get back at Deckard, they flew her to the spaceship to die. Earth’s forces tried to attack the ship in orbit but failed since it was so superior in technology, one that the replicant’s designed themselves. Near the end, Deckard succeeded in getting to the ship. Along with one Bladerunner, they finally got to the leader and offered a deal. Humans would extend the lives of the remaining replicant fighters if they destroy their own ship without harming Earth.
The replicant leader refused, saying they knew they would be hunted all along and that they just wanted a taste of human life before expiring. They have no desire to exist like humans for all the ugliness they have seen. What they want is to rid the universe of the human specie. The leader finally revealed they have met aliens in their space travels and discovered them to be peaceful creatures and humans are actually a threat to the universe.
The replicant leader explains they really did not invent any of the advanced technology the Bladerunners have seen them using but those were given to them by the alien race they met. At the end though, Deckard convinced the replicant to give humans a chance to change. The replicant then gave Rachel to Deckard telling him, Earth’s life is in their hands. Though the ship’s detonation cannot be stopped, if they could gain control of the ship, they could fly at a distance and explode without harming Earth. The leader then says goodbye to Deckard and launched himself to outer space to die.
As the ship counts down to detonation, Rachel tried everything to take control of the ship. Finally, she understood. When she told him, Deckard balked. Yet in the end, Deckard helped her take her chip out, killing her body. He then installed it in the ship’s brain system. Rachel, now the ship herself, flew away from Earth and despite Deckard’s protests, launched him in small space vessel back to Earth before she exploded.