A gang that usually holds up drugstores robs and kills the manager of a dance hall. A stake-out in a garage yields results and a total of twelve guns. After a trial, two of the gang break out of jail. A gang of hold up men has been running loose in the city. They've committed more than a dozen robberies and are heavily armed and quick to shoot. Detective Sergeant Joe Friday has been assigned to Robbery Detail and it's his job to stop them.