This is a future world, where robots control the world. The robots want to completely occupy the world and kill all humans, but they encounter the stubborn resistance of the human elite Connor. Therefore, the Terminator robot T-800 (Arnold Schwarzenegger) was ordered to go back to 1984 and kill Connor's mother Sarah (Linda Hamilton) in order to prevent Connor from being born. After Connor learned about it, he quickly sent the soldier Reis (Michael Biehn) to rescue. Reis came to Los Angeles in 1984 and rescued Sarah who was being chased by the robot in time - she was still a college student at the time. However, people regarded Reis as a madman and did not believe that robots would rule the world in the future. It was not until Sarah was chased by robots again that she believed it all. During the journey, she fell in love with Reis and became pregnant with the future Connor, and Reis also fell into a bitter struggle with the robot. Can the human world change its original bad luck because of this struggle?