So Long Mr. Chumps (1941)

"Nuttier than ever!"

The stooges are street cleaners who find some valuable bonds and return them to their owner. The man is so grateful that he offers them a big reward if they can find an honest man with executive ability. Their search leads them to a woman who's fiancée is honest, but he's in jail. The boys decide to commit a crime so they can go behind bars to find him. In prison the boys locate the man and help him escape, only to find out that their benefactor is a con man and on the way himself to the slammer.