An asteroid named 2087PU crossed dimensions and reached the top of the atmosphere without us noticing.
The earth was nearly destroyed as a result, and hundreds of millions of humans died in the destruction.
Thus was born the Earth Research Institute, which was founded by the only remaining scientific researchers in the world with the assistance of the Earth Government.
And we are also working hard to find a way to go back in time through this destruction, and pass information to the past through the same cross-dimensional method, hoping that the earth can avoid disaster.
Mission: Work hard to save the earth