In 2023, the earth suffered a devastating disaster unprecedented in history, and all modern humans were extinct.
Five hundred years later, the earth has re-evolved "future humans" through continuous self-repair.
In 3023, a thousand years after the disaster, "future humans" have reached a bottleneck in the reproduction of future generations.
The Human History Research Laboratory voted to use the "Time Corridor" to travel through the past and re-study the genetic structure to solve the bottleneck of future human reproduction.
The leader of the research room - Dudu, is the executor of this task.
In this process, Duodu saw the rich emotions and complex human nature of modern humans. At the same time, he also understood that the so-called reproduction bottleneck of future humans is just the gradual disappearance of human inner emotions in the future. How can humans be considered human beings without emotions?
As they get along day and night, he falls in love with Si Yuexi, a modern human being, and he also understands the problem of the bottleneck of human reproduction in the future.
But he would eventually return to the Earth in 3023, and in order to prevent the time corridor from being affected, he did not bring Si Yuexi from the past back to the future.
However, the moment he stepped into the time corridor, the earth suffered a planetary impact. All humans were destroyed in just a few seconds, and the earth fell into a deep sleep.
In Back to the Future , the overlap illustrates the crux of the problem of reproductive bottlenecks.
After the problem was solved, he began to try to enter the time corridor again. He wanted to bring Si Yuexi back to the future before the planet collided.
After experiencing several failures, Si Yuexi appeared from the corridor of time one dawn.
But she didn't have any memory of the past period with Du Du, which meant that Si Yuexi didn't know Du Du.
"It doesn't matter. I have traveled through the past countless times and fallen in love countless times. This time, we will definitely fall in love again."
Overlap traveled to the future world with Yuexi, and experienced high technology that had never been seen in the past.
But Si Yuexi is someone who traveled through time before arriving at Overlap. The distance between them is a thousand years, and the side effect of a thousand years to Si Yuexi is that she forgets very quickly. The longer she is in the future, the shorter the memory stays in her mind. Eventually, she will become a "time wanderer" who does not belong to the past, the present, or the future.
Just like a robot without a chip, only a shell remains.
Therefore, when the residence time reaches the limit, the overlap must send the monthly interest back to the past through the time corridor.
After Yuexi returns, all memories from the future will no longer exist, and she still won't remember the overlap.
Of course, there was a time when she remembered - overlapping the first time traveling to before the planet hit the earth.
"If the cost of me remembering you is losing my life, that's okay. At least at that moment, I still remember you."
Intention: If the price of remembering you is losing my life, that's okay. At least at that moment, I still remember you.