Flash Gordon Conquers the Universe

A terrible bane has come on the Earth, the "Purple Death". It leaves a purple mark on the face of its victims. The earth is saturated by this mortal dust that propagates the death. Flash Gordon, Dale Arden and Dr. Zarkov investigate from their interstellar rocket. In the sky they see a rocket from the planet Mongo that spreads a sort of powder that becomes invisible as it falls. Of course, it is again coming from pitiless Ming...