The story takes place in the span of the near future to two hundred years later. The civilization of earth was locked by the three bodies with a super technology called Tomoko, and basic research has stalled. However, humans still need to continue to advance to resist the upcoming attack of the three-body, guarding their homes and human civilization. On a broader scale, the three-body civilization and human civilization are both hunters in the dark forest. Carefully protecting themselves and destroying others, struggling for the survival of their civilizations.