The near-Earth object "Charon's Eye" suddenly disintegrated, sending a large number of fragments straight towards the earth. The world urgently launched the "Qingtian Project" - deploying orbital laser arrays for interception. As the chief scientist, Lin Mo did not hesitate to sacrifice himself when intercepting the largest fragment, but unexpectedly survived.
After humans successfully resolved the crisis, they discovered that the "Eye of Charon" was not a natural celestial body, but a creation of an alien civilization. A message from the "Watchers" warns: Humanity has just passed a "written test", and the real "practical test" is how to deal with the coming "Reapers" - a cosmic force that wipes out "failed civilizations".
As the Stargate opens, Lin Mo and Xing'er lead mankind to explore the truth of the universe and discover the complex system that oversees cosmic civilization and its internal contradictions. Humanity is forced to choose between protecting the earth and assuming cosmic-level responsibilities, and ultimately learns not to rely on foreign technology, but to win its place in the universe through its own wisdom and unity.