The military is performing a practice air raid on New York City.
Sach convinces the boys that it is real and they go down to the recruiter's office and enlist.
However, the army is using the plans for that ray as a decoy to try to capture spies that are at the local base…the same base the boys have been assigned to.
Warner Archives released the film on made-to-order DVD in the United States as part of "The Bowery Boys, Volume Four" on August 26, 2014.
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