While making their escape from robbing a bank, members of a fifth column organization, the "Order of the Black Dragonfly", steal the boys' wrecking truck.

Meanwhile, Axis agents working for "The Baron", a Japanese leader of the "Order of the Black Dragonfly", have more plans for the junkyard, especially the aircraft parts stored there.

Their takeoff ends in disaster as Ace hits a fence, tearing off the landing gear and punching a hole in the gasoline tank.

The Dead End Kids and Junior G-Men lead the government to the Baron's base and a furious battle takes place.

[5][N 1] Hal Erickson on the Allmovie website reviewed Junior G-Men of the Air, condensing it to: "Over the course of twelve weeks, the kids are pitted against the worst kinds of villains and pluguglies, but by the final chapter our heroes have thwarted the Black Dragons' plans to sabotage the American defense program.