An internationally-notorious criminal scientist returns to the US to sell his latest invention, a disintegrating gas, to a foreign power. When he arrives, however, he is spotted by a young Coast Guard man, whom he kills - and thus earns the enmity of the entire US Coast Guard, but especially the murdered Guardsman's older brother who, together with his reporter-girlfriend and her comical photographer, vigorously sets to tracking him down and interfering with his plans to develop the city-melting gas in quantity. A Republic Serial in 12 Chapters.
- Genre: Science Fiction, Action
- Studio: Republic Pictures
- Keyword: invention, coast guard, mad scientist, murder, criminal gang, movie serial, foreign agent, disintegrating gas, female reporter, avenging brother
- Cast: Bela Lugosi, Ralph Byrd, Maxine Doyle, Richard Alexander, Lee Ford, Herbert Rawlinson
