A murder at the Metropolis Munitions plant draws Lois Lane into the thick of a sabotage plot; she ends up inside a torpedo about to be tested. Meanwhile, where is Superman?
Extortionists with a super-powerful bullet-shaped flying rocket car threaten destruction to Metropolis. At first they seem to defeat even Superman, but their capture of Lois Lane spurs him to new efforts...
American industry builds a gigantic new bomber and Lois Lane stows away on the test flight; little does she suspect, Japanese spies are aboard to hijack the giant. Superman to the rescue?
An enormous gold shipment en route to the mint is hijacked by well armed robbers, and Lois Lane is trapped in the runaway locomotive. This looks like a job for Superman...
