Before we get started, we feature the new, high tech, turbo prop Airliner that transports passengers cross country. It helps to prove the kind of endurance the kiddies can also enjoy by drinking the sponsor product.
A noise that comes pounding from behind a door proves not to be spies, but the Silos. Ma is mad at being locked up in such an undignified manner.
Annie reveals to her that the men were foreign spies who were after plans for the air plane. Between Annie, Ma, and Elmer, more secrets are revealed about Nickelson, and his helpers.
Beautiful butterflies! Annie has hit on how the spies have made to make their get away. Can she and her friends act fast and stop the spies? Joe and Annie need their parents permission to go traipsing across the country. Good thing they’re such bright and trustworthy kids. Although Ma is worried, she lets Annie do her brave and patriotic duty to come to the aid of the nation.