Plot: Flash Gordon is an American football player who along with Dale Arden are returning to New York City after a long vacation, until the plane they are passengers on crashes into the laboratory of Russian scientist Dr. Hans Zarkov. Both Flash and Dale become unwilling passengers on-board Zarkov's rocket-ship as Zarkov sets a course for the planet Mongo. Arriving on Mongo, Flash and his companions find the planet is under the ruler-ship of the evil Emperor Ming the Merciless and Ming is attacking Earth with natural disasters as he bids to destroy Earth. Realising that Earth and the human race is in mortal danger, Flash decides to unite the kingdoms of Mongo and combine the forces of rivals Prince Baron and Prince Vultan to rescue Dale, who is to become Ming's wife and defeat Ming and save Earth from annihilation.