One con merchant on his patch is one too many for Inspector Gamble. So when he hears that Harry, a comparative minnow in a major school of fraudulent activities, is swimming back to town, he takes note of the man's activities.
Arthur New's troubles really begins when he crashes his new car. Claiming off his insurance proves tricky, especially when it appears that someone has made off with his -and other people's - and other people's - premium payments. Gamble investigates.
Hearing that conman Charlie Dickens is 'going straight' and found a 'respectable' job, the cynical and experienced Gamble is sceptical of Charlie's claims. Vicky, however, is prepared to give him the benefit of the doubt - an unwise move.
Rex Lycian, on bail with a fraud charge hanging over his neck, gatecrashes the Policeman's Ball to 'settle accounts' with Gamble, the man who arrested him, But is there another reason for untimely intrusion?
Building tycoon Jim Harland's firm can only survive if he forms a partnership with a Dutch firm - a building company Gamble suspects of fraudulent activities. An inspection of Hardland's books is for, which, when checked reveals some surprising discrepancies.
Newspaper adverts offering the location of extremely cheap flats for a fee seem too good to be true,and they are, until, by mailing out brochures, the crooks seem to cover themselves legally.
A fraud with a difference is brought to Gamble's attention: someone is getting rich by selling undelivered domestic appliances to an old folks' home. The detective digs deeper to find out who is behind the con game.
When an illegal Indian immigrant from Kenya becomes reluctant to pay a blackmailer, the criminals resort to kidnapping his daughter, along with that of Inspector Gamble.
A shock awaits Detective Gamble when he is called into his superior's office. Laughton, a tax investigator asks the detective a lot of disturbing questions - questions relating to the left-wing activities of Gamble's wife, Helen.
Gamble is asked to investigate the activities of a retired spinster, a woman responsible for administering a charity fund for the sick and needy - from which only one payment has been granted in three years.