At the end of the 22nd century, the earth was heading for destruction due to "entropy catastrophe". Lin Yuan, the last survivor of mankind, witnessed his lover Su Wan falling into the abyss to protect him in the ruins. Ten years later, Lin Yuan devoted his entire life to building a machine "Ouroboros" that could fold time and space in an underground bunker. With the memories and despair of the future, he jumped back to the time when the disaster was beginning to take shape twenty years ago.
However, the corrective power of space and time is far beyond imagination. Lin Yuan discovered that Su Wan's death and the destruction of the planet were not isolated incidents, but were tightly bound by a secret plan called "Protocol Zero". Every time he tries to change Su Wan's fate, it will trigger a more violent space-time backlash, accelerating the collapse of the earth; and every time he tries to save the planet, Su Wan will die due to a combination of circumstances. After countless cycles and revisions, Lin Yuan finally realized that the real solution was not to "change the past" but to "face the future head-on." Together with Su Wan, he must give up his obsession with a perfect ending, plant the seeds of new life on the ruins of destruction, and use current choices to rewrite the destined ending.
Intention: What is the eternal meaning?