On December 20, 2012, three gravitational-wave detectors at a forgotten observatory on Earth simultaneously captured a signal that came from no known celestial body.
It was neither a supernova nor a black hole merger. Its waveform sounded like a whisper, and even more like a thread pulling at fate.
Billions of light-years away, three planets sharing the same orbital path, the gloomy Winter Yin, the tranquil Spring-and-Autumn Xingfeng, and the scorching Summer Qing, all felt the ripple at that very moment. Their three civilizations, each harboring its own secrets, shared a taboo buried for two thousand years: a causal abyss known as the Void Gate.
Yang Zhiyu, a purple-blooded legal scholar, unearthed an ancient pact from old texts, one no one dared to sign. Qi Nanxu, a green-blooded girl, broke into her father's secret chamber and met an amnesiac visitor from Earth. Yang Shixu, a red-blooded boy, discovered that his bloodline was silently resonating with an ancient symbol. That symbol pointed to a blank spot on the star chart: a blue planet that humanity called home.
They had no idea what was watching from beyond the gate.
Nor did they know that the fuse stretching from the depths of the star abyss would set in motion not one person's fate, but a cycle spanning two worlds and two thousand years.
The gate is open. Do not look back.
But the price of looking back is the survival of an entire civilization.
