A gangland murder is the motivating factor of this fast-moving crime drama. George Murphy stars as reporter Kent Shevlin, whose investigation of the murder leads to a tenure as a temporary FBI agent. His subsequent adventures lead him to Mexico, where he makes the acquaintance of Ramirez (Akim Tamiroff), a bold bandido who isn't all that he seems to be. The story ends up with a kidnapping masterminded by smooth mob boss Riley Ferguson (Sidney Blackmer). The woman of the title is Barbara Andrews (Gertrude Michaels), the daughter of a U.S. senator (Samuel S. Hinds) who figures prominently in the various intrigues.