Trapped by G-Men plot
"JACK HOLT Blasting gangdom's hide-aways"
After a bank robbery, Harry Grady and Fred Drake are on the run. Drake suffered a gunshot wound during the robbery. Their hideout, a garage in Tuckson, is discovered, with Grady able to escape and Drake being arrested. FBI boss Conover puts his best agent Martin Galloway on the case. To track down Grady, Martin poses as the bank robber Bill Donovan. Martin gets assistance from Agent Alice Segar. Aliice goes incognito as 'Mrs. Donovan'. After being allegedly arrested for a $200,000 theft, Martin is put in jail with Drake. Martin and Drake want to escape and they succeed with the help of Alice. On the way, Drake dumps Alice, but it looks like Drake is taking Martin to Grady's new hideout.