In 2050, due to the influence of alien civilization, the sun experienced abnormalities and the earth faced an existential crisis. College student Mu Qingyan and her classmates experienced extreme events such as high temperatures and plagues in the apocalypse. To escape the high temperatures, humans began unprecedented migrations. Will the earth survive or be destroyed? Where is the way out for mankind? Are aliens friends or foes? Can human civilization be continued? When a crisis comes, only solidarity and mutual assistance can still have a glimmer of hope, and the earth will still shine with the light of hope.