Detectives set out to track down a gang of international jewel thieves who have just stolen more than a million dollars worth of valuables from an estate in New York.

Charles Mendoro, an erstwhile family man, and his partner use poison gas to rob currency exchanges in Chicago.

FBI special agents are called in to capture the notorious bank robber and kidnapper Alvin Karpis, the machine gun blasting thug who provides the muscle for the infamous Karpis-Barker gang. Federal heat forces Karpis from hideout to hideout but Karpis always stays one step of the FBI. The G-men play their trump card and, knowing that the gangster loves fishing, manage to track their quarry to popular pier.

Federal agents set off on the trail of a family of bank robbers who have stolen more than $50,000 from an Oregon bank.

A Canadian-born cat burglar tries to maintain his blissful domestic life while stealing guests jewelry at parties on both coasts and selling them to unwitting gem merchants in other major cities. Police begin to close in when one of the merchants recognizes the man from a wanted poster he accidentally saw while applying for a gun license.

Police in Buffalo, NY, mount a search for a ring of deadly jewel thieves believed to be hiding across the border in Canada.

A masked phantom and his gang commit a series of payroll robberies, and the police can't seem to find a trace of them.