This story about the U.S. Department of Justice and its agents begins with a daring mail-truck robbery by a ruthless gang that flees to the western U.S. after the robbery. When money from the robbery shows up in a small Kansas town, the department sends agent Dick Grant to investigate, posing as a businessman. He is hindered in his assignment by local newspaper reporter Helen Sherwood, and when he falls in love with her, he is unable to reveal to her who he really is and why he is there.