U.S. Marshall John Kruger erases the identities of people enrolled in the Witness Protection Program. His current assignment is to protect Lee Cullen, who's uncovered evidence that the weapons manufacturer she works for has been selling to terrorist groups. When Kruger discovers that there's a corrupt agent within the program, he must guard his own life while trying to protect Lee's.
The East Side Kids discover that one of their own, Danny, is torn between staying and school and becoming a boxer, and is getting mixed up with gangsters.
A group of young men who work at an aviation factory begin to suspect that a doctor who runs an air ambulance service is secretly a spy transporting secret information from the plant to enemy agents.
A street kid has dreams of becoming a jockey. He gets his chance when he and his gang discover a poor old man who has a championship race horse. The man agrees to let the boy ride his horse in a race, but first the gang must get enough money to pay for the race's entry fees.
Sir James Blake has retired from Scotland Yard so that he can assist his niece Hope and her friend Jerry in developing an apparatus they have invented. Sir James thinks that their invention has the potential to prevent wars, and plans to donate it to the League of Nations. But a gang of criminals led by the elusive "Scorpion" steals the device, and Blake and his associates must recover the invention and determine the identity of the "Scorpion".
A secret apparatus that controls bombs by remote control is stolen from a laboratory. A federal agent is assigned to recover it, and his investigation leads him to a creepy mansion that is honeycombed with secret passage ways.
