Rather baffling propaganda drama. A group of Fifth Columnists, out to harm the US' war effort against the Japanese are killed off one by one by the mysterious M. Colomb (Bela Lugosi) - who seemingly is allowed to wander around the house of Mr Saunders (George Pembroke) without anyone querying exactly why or who he is.
Young detective Dick Martin (Clayton Moore) and Saunders' niece Alice (Joan Barclay) are trying to find out what is going on though without much success (just like the film going public no doubt). Colomb runs rings around everyone, able to appear wherever he likes in Saunders' house...
A rather clunky film though full of suspense and dark shadows. There is also a lot of inept police work on show. The plot is rather confusing, though at the end things become a little clearer when Columb's real identity and purpose is known. Though while the plot becomes clearer plausibility is stretched somewhat. The film should just be enjoyed for what it is. Mostly nonsense, but decent enough nonsense.