Twenty years ago, scientists discovered through astronomical observations that a tiny black spot appeared in the center of the sun. No one knew what this black spot was or why it appeared, but one thing is certain: this black spot is slowly getting bigger as time goes by. At this moment, the earth is facing serious problems - global warming. Glaciers are melting faster than people imagine. Rising sea levels have caused many islands to be in danger of being swallowed by seawater. Continuous high temperatures have made people's lives inconvenient. Countries around the world have sent their most powerful scientists to form a joint group, named SWW, to jointly solve global problems. However, SWW's research has found that solving energy and environmental problems cannot slow down today's rapid heating, because the real reason is that the earth is gradually approaching the sun. At the same time, not only the earth, but also the planets in other solar systems are approaching the sun at the same speed. It is precisely because of the appearance of the black spot in the center of the sun that the solar system has changed. Until one day, a guest came from the earth. He informed the earth that a catastrophe will occur in the solar system, and no one on the earth will be spared. And after knowing this, how will mankind face it, and where will the fate of mankind go...