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In this sequel to "The Underground Court", Nero Rankin (Will Kuluva) has installed himself as chairman of the Syndicate, replacing the estimable Judge Foley. When Elliot Ness (Robert Stack) manages to convince Rankin's secretary Sylvia Orchins (Jean Carson) that her boss will be killed unless she cooperates with the Feds, Rankin quickly disposes of the hapless girl and gives Ness a "message" by sparking a bloodbath in which innocent bystanders are mowed down in the streets. Ironically, this turns the public against Ness rather than Nero--making it all the more crucial to end Rankin's reign of terror before Chicago becomes one huge slaughterhouse.