A murderous gang of counterfeiters has kidnapped John Severn (played by Ray Parsons), the U.S. government's best engraver.

He is forced to engrave a set of counterfeit plates, to print phony money that is virtually undetectable from genuine currency.

The United States Secret Service sends its toughest agent, Jack Holt (played by himself), and his female partner, Kay Drew (Evelyn Brent), after the gang.

The head of the ring is gambler Lucky Arnold (John Ward), but he hides behind the facade of one of his loyal henchmen, Quist (Ted Adams), to shield himself from the Secret Service, and lets another one of his men, Ed Valden (Tristram Coffin), do most of his dirty work.

Authors and critics marveled at the film's breakneck pace and hectic, six-against-one fight scenes as staged by former comedy director James W. Horne.