Sgt. Al Bogart does a favor for Cal Calhoun and in return wants Calhoun to return the gesture. It's a shadow job on a crook named Sid Lucas. Bogart wants no questions asked and no other cops involved. Cal is puzzled but because of Bogart's sterling reputation as a steady, reliable desk cop he accepts the job. Bogart wants to be in on one great headline grabbing arrest before his retirement and he is convinced Lucas can lead him to Taylor Ferguson...a bar owner who's cheating the IRS. At least that's the story he tells Calhoun.