The world is flooded by "toxic breath", and human beings can only live in the "bubble of life". The bubble will continue to shrink, and "expansion particles" must be collected to expand the territory. The protagonist activates the "god-level sign-in system" at the beginning, and signs in every day to receive divine equipment. The bubble directly expands into an aerial fortress, and then crushes various lords along the way. Finally, it is discovered that the source of the poisonous breath is the "alien colonists" screening the strong ones.
