An island country randomly discharged nuclear sewage, which was followed by earthquakes and tsunamis, nuclear power plants exploded, and biological laboratories were destroyed. Viruses and bacteria cultivated in the laboratories were rampant, triggering a series of disasters. The earth's environment gradually deteriorated. In the continuous survival and change of mankind, Gu Hua'an met the space boundary stones Duoduo who traveled from another time and space. They met by chance and formed a natal contract, traveling through different time and space together, accumulating merit.
