3I: Reverse Axis

In 1977, astronomers captured a strong signal lasting 72 seconds in the constellation Lyra. It's too strong, too accurate, too artificial. Humanity has waited expectantly for half a century, but has never heard its echo again. As a result, the scientific community declared that it was just a cosmic "hiccup", a misunderstood noise, and even the recording tapes at the time were thrown into the trash. We thought it was gone, but in fact it was just arriving. In 2025, a comet code-named 3I broke into the solar system. It's a piece of metal, it's hot, it has impossible orbits. It defies gravity and swims against the current, like a visitor who rings the doorbell and kicks open the door without waiting for a response. While all mankind was cheering for this "interstellar visitor", astronomer Li Mo saw a string of blood-freezing data on the monitoring screen. The comet's trajectory, if pushed back 48 years, would point directly to the constellation Lyra. It didn't go away. It has been watching us, watching how we laughed at that signal, watching how we forgot its existence. This time, it stopped saying hello.