Perhaps my score of 4 is a bit generous. All I know is that this isn't the sort of film I'd heartily recommend, as it's pretty dull and pretty cheap.
The film begins with Richard Arlen traveling the rails. He's a hobo with a secret--and a very patriotic hobo at that. It's just after Pearl Harbor and Arlen has a fight with his fellow 'bos about the war and volunteering. Soon, Arlen meets up with Guinn Williams (in one of his better roles) and the two go off to volunteer with the US Navy. Williams was a retired navy man and Arlen seems to have some knowledge of the navy BUT he also has a secret. What it is and why he's posing as someone else is something you'll have to see for yourself---if you care.
The film is only occasionally entertaining, but to me finding out Arlen's secret wasn't worth time I invested in this WWII propaganda film. Aside from Williams' nice part, the rest of the cast just seemed pretty dull and the story was, at best, lackluster--showing the earmarks of a B-movie produced by a third-rate studio.