Centers on the adventures of Aero-Bot, Beast-Bot, Buzzer-Bot, Speed-Bot, and Strong-Bot, a group of robotic protectors sent to Earth from their home city of Botropolis, which is located on a comet. These Go-Bots can transform from their robot mode to a variety of altmodes, each representing one of the toys released under their name (for example, Beast-Bot can turn into both a gorilla and a cheetah).
Dark Matter, an alien organization, has been freed from captivity and comes to earth, and can only be stopped by Sun, who transforms into Fujiyama Ichiban, a hero that dons solar powered armor.