As the wobbling of the cosmic counterweight caused problems throughout the universe, extraterrestrial beings from scientifically advanced planets set out to identify the cause. Upon discovering that the cause was the gradual disappearance of precious energy from the cosmos, they invented a machine to preserve and protect it and began dispatching representatives to other planets...

Among the aliens dispatched to Earth are Pio from the planet Pigur, and Loco, Buddy, Pisa, and others from other planets, who later head to Earth.

Aliens are beings who have no choice but to hide themselves as strangers on Earth. Pio, who was cautiously exploring various places such as Earth's climate crisis and earthquakes, loses his spaceship on the rooftop of an unemployed young man's house where he had briefly landed. Eventually, while staying at the young man's house, he meets Saerom and Geon, two children, and together they set off on an adventure to find precious energy.