The novel begins with the world falling into an unexplainable "Great Silence". All sophisticated electronic equipment fails and human civilization suddenly collapses. Former meteorological observer Shen Tinglan accidentally awakened to the "event selection causal system" in despair. The system interface is not an entity, but appears in the form of "intuitive options", "memory fragments" and "future flashes" when she faces key choices. For example, facing a door, she "perceives" that option A (breaking in) leads to both resources and danger, and option B (leaving quietly) leads to temporary safety but missed clues. The core suspense of the story is that the "Great Silence" at the end of the world is not a natural disaster, but a side effect of the human-induced "World Formatting" program, and her system is a "debugging backdoor" or "virus" left behind by this program. Every choice she makes is not only related to survival, but also invisibly disturbs the underlying rules of the doomsday world, attracting the attention of the "formatted executor" hidden behind the scenes. She met Gu Zhao, the amnesiac rescue captain, and the two worked together to explore the truth, only to discover that Gu Zhao's amnesia was directly related to the core secret of the "Great Silence".
