The story takes place in the historical span from the near future to two hundred years later. The earth civilization was locked by the three-body super technology called Sophon, and basic research stagnated. But mankind still needs to continue to advance on this basis to resist the upcoming Trisolaran attack and defend its homeland and human civilization. On a broader basis, the Trisolaran civilization and human civilization are hunters under the dark forest, carefully protecting themselves and cleaning up others, struggling for the survival of civilization.