Classic serial action (in fact in many ways the classic serial) as Flash Gordon (Buster Crabbe) and Dale Arden (Jean Rogers) travel to the world of the evil Ming the Merciless (Charles Middleton) which is travelling towards Earth...
The planet Mongo is inhabited by various warring factions including the Hawkmen and Lionmen but Ming rules over all. Flash, Dale and scientist Dr Zarkov (Frank Shannon) have a series of adventures in the crazy world, and as its a serial there are many cliffhangers.
It is just so much fun, and sparking space ships. Of course it is also rather simplistic but that doesn't matter as its thrills a minute and has so much charm and energy.
Princess Aura (Priscilla Lawson) is endlessly scheming to get Flash for herself but he only has eyes for Dale of course... To be honest that's just one of many things that doesn't really make much sense in the cold light of day but that is exactly the wrong way to approach this romp.