A compilation film built from the Sengoku Majin Goushougun TV series, combining scenes from episodes 17 and 20 with new footage and mock commercial breaks in which the characters advertise made-up products. In the early 21st century, the secret organization Dokuga, ruled by Neo Neros, controls much of the world's politics, economy and military. After physicist Professor Sanada dies to keep his research out of their hands, his son Kenta is rescued and brought aboard the teleporting fortress Good Thunder. Its crew fights Dokuga around the globe with GoShogun, a giant robot crewed by three pilots and powered by the Beamler energy Sanada discovered.