After a spate of explosions of strategic industries, the mysterious Masked Marvel (William Forrest) investigates a gang of saboteurs led by the wonderfully over the top evil Sakima (Johnny Arthur). The Marvel assembles a group of agents, one of whom is himself, only Alice (Louise Currie) knows which one is the Masked Marvel.
The Masked Marvel gets into a number of cliff hanging perils before his final showdown with Sakima...
A wartime adventure romp, and a pretty standard adventure serial. This is highly enjoyable nonsense with the usual ridiculous stunts. The acting is a bit patchy but this is a show for the stunts and adventure, and these are both top notch.