When a meteor crash-lands on Earth, it unleashes a potent energy source known as Beamler, coveted for fueling the mighty battle robot GoShogun and the teleporting fortress, Good Thunder. The notorious Docougar Crime Syndicate, under the leadership of the crime lord Neo Neros, plots to seize this revolutionary energy. However, the inventor of GoShogun sacrifices himself to prevent them from obtaining it. Now, Neo Neros sets his sights on the inventor's son, who finds refuge with the courageous crew aboard Good Thunder. Together, they embark on a global journey, engaging in epic battles against Neo Neros's villainous minions using the formidable power of GoShogun.