Spectrobes are strange creatures that use light energy to unleash amazing powers. They once roamed the planets of the Nanairo solar system but now they are extinct. Luckily, Planetary Patrol Officer Rallen can bring them back to life thanks to the lab system on his spaceship. Spectrobes come in three sizes: Child Spectrobes can search for items for excavation, but cannot take part in battles. Adult Spectrobes can fight in battles and serve as Support Spectrobes, while fully Evolved Spectrobes boast the best fighting skills. While on patrol in an everyday mission, Planetary Patrol Officers Rallen and Jeena respond to a mysterious distress signal and happen upon the wreck of an escape capsule in which an old man has been in a cryogenic sleep for many years. Once he comes around from his deades-long slumber, the man called Aldous tells an incredible tale of an attack on his home planet by vicious alien beings known as the Krawl. Aldous is a scientist, and has identified creatures called Spectrobes as a natural enemy of the Krawl. He's also patented a device named a Prizmod to harness their power. Aldous and his two new friends must gather as many Spectrobes as they can to stop the Krawl from devouring any more planets.