The Earth has a companion star in negative 3-dimensional space and time, called Nidia. The three partners set off from these two planets and came together with small creatures from other planets. Under the guidance of a crazy theorist and funded by traveling merchants, he embarked on a journey to find the ancient artifacts left by the pioneers from the mother universe and revive the stars that were extinguished by the dark world, going through all kinds of hardships. Because they are small creatures, a vulnerable group in the sub-universe, and are just playthings created by advanced beings. During this period, the thrilling competition between the light world, the dark world and other mysterious worlds was intertwined.