Frank Warren is a treasury agent assigned to put an end to the activities of a powerful mob crime boss. Frank works undercover, posing as a criminal to seek information, but is frustrated when all he finds are terrified witnesses and corrupt police officers.

Glenn Ford
as Frank Warren

Nina Foch
as Judith Warren

James Whitmore
as George Pappas

Barry Kelley
as Attorney Edward J. O'Rourke

Frank Tweddell
as Inspector Herzog

Howard St. John
as Joseph S. Horan

John F. Hamilton
as Police Desk Sergeant Shannon

Leo Penn
as Sidney Gordon

Joan Lazer
as Rosa Rocco

Esther Minciotti
as Maria Rocco