The story begins when microbiologist Lin Wanxing discovers that the metabolic cycles of deep-sea archaea are perfectly synchronized with a mysterious pulse from the depths of space, the Eternal Boundary Monument. This discovery reveals a truth that upends everything: the universe humanity inhabits is not a cold physical machine, but a colossal living organism. Earth is one of its “cells,” and humanity is merely a group of “microorganisms” within that cell that have only just become aware of their Host.
As scientific elites from around the world are recruited into the secret “Horizon Project,” humanity is horrified to learn that our very act of scientific observation is being identified by the Host as a dangerous “recursive cognitive activity” that could trigger its “immune system” to begin a cleansing process. The five mass extinctions in Earth’s history were not random disasters, but immune responses through which the Host purged past “cognitive contamination.”
Facing an existential crisis, humanity splits into factions. The “Integration Faction,” represented by Neumann, argues that people should abandon individual consciousness and merge with the Host to survive. Lin Wanxing’s team, on the other hand, tries to find a third way: to become a “benign symbiont” within the Host, capable of self-regulation. They must decipher seven mysterious symbols from different ancient civilizations and answer fundamental questions about self-awareness, understanding the universe, and collective cooperation before time runs out, proving that human civilization deserves coexistence rather than eradication.
Spanning the microscopic world of deep-sea laboratories and the vast scale of the cosmos, the story blends biology, cosmology, mythology, and cognitive science. It explores the ultimate questions of how finite intelligent life can find meaning, dignity, and love in an infinitely vast universe that can never be fully understood.
