In AD 2847, human civilization has spanned a 120-light-year star area. A deep space signal that has been deciphered for 206 years has finally revealed its true identity: a star map pointing to a galaxy that has never been observed 112 light-years away.
The coalition government established the "Deep Submarine" expedition ship to carry out the most distant interstellar mission in human history. The navigator Lu Ming is the key to the mission - he is the only survivor of the last deep space mission. There is an irreparable memory gap in his brain. No one knows how he survived, and no one knows what is hidden in that blank space.
After setting sail, strange things happened one after another: unknown sediments appeared on the hull that would grow, the navigation system showed that the spacecraft had "disappeared" for 5 days, a crew member suddenly spoke a language that had never been recorded... And all the abnormalities pointed to the same source - a being who calls himself the "Echoer".
Lu Ming was forced to face the truth that he had forgotten: in the last mission, his teammates were not sacrificed, but were transformed into "messengers" by an information-state parasite called "seed". And he was the first person to refuse transformation - and the first person to bring the "seed" back to the earth.
"Seeds" have been lurking in human electromagnetic networks for two centuries. Their purpose is to "format" human collective consciousness and make room for the remaining consciousness of an ancient civilization. But something more terrifying is coming - the "Silent Throne", a "vacuum of consciousness" condensed by the despair of countless devoured civilizations. It feeds on civilization and uses fear as a guidepost.
Countdown to 47 days.
