Sonya Miles, a pretty secretary, engaged to marry her wealthy boss's son, is threatened with blackmail by her sleazy ex-husband, a rodeo performer. She hires Mike to keep her former spouse in line. Mike reasons with the cowboy - using both of his fists - and thinks the situation is in hand, but the ex-husband forces Sonya to break into the office safe at night. When the cowboy is discovered murdered in the office, the money gone and Sonya's purse is found at the scene of the crime, only Mike believes in her innocence.