The tale unfolds over a time frame ranging from the near future to two hundred years hence. Trapped by the ingenious technology of Tomoko, the Earth's civilization has come to a standstill in terms of fundamental research. Nonetheless, humankind must strive to progress and prepare for the imminent invasion from the three-body beings, all the while safeguarding their homes and society. Ultimately, the three-body civilization and human civilization are akin to predators lurking in the shadows, fiercely protecting their own kind and annihilating their foes in a bid for survival.