T-Men

When the American Treasure Department finds that a gang in Los Angeles is making false currency, agents Dennis O'Brien and Tony Genaro are assigned to investigate the counterfeit gang using the identities of Vannie Harrigan and Tony Galvani in Detroit. Along their investigation they join the gang of mobsters trying to discover who the boss behind the scheme is.

The story involved two U.S. Treasury agents who go undercover in Detroit and then Los Angeles in an attempt to break a currency counterfeiting ring. The agents try to join the gang by posing as counterfeiters from out of town. One of the agents is killed by the gang while the other undercover T-man watches in horror.