Henry investigates a prowler fond of older ladies, and begins to suspect the celibate supplier of his cheese.

Fisher's younger daughter has left home after a row and thrown in her lot with a group of squatters. He asks Crabbe to find the girl and try and persuade her to return home. Henderson has bought a new field to add to his market garden, but is horrified to find that it has been invaded by travellers. He appeals to Henry for help, whereupon Henry finds that the two cases have a common thread.

Medium Faith Revelle has received a number of threatening letters and seeks police help. Freddy Fisher, having once sought advice from her in solving a case, wants the whole matter dealt with quietly. But someone has alerted the press. Henry Crabbe and Sgt. Cambridge are assigned to guard Miss Revelle.

Fisher drags Crabbe down to the West Country to investigate the apparent murder of an undercover woman police officer. While Henry is away a burst pipe causes havoc in the restaurant's kitchen.

Fisher sends Henry and the squad to a meat factory where animal rights protesters are demonstrating against the owner,Mr. Trubb's use of veal in his Trubbs' Thunderbolt sausages. However, Henry finds to his surprise that the sausages contain soya and are wholly meat-free. Margaret, meanwhile, is concerned when her friend Julia, a wealthy widow, falls for a pilot much younger than herself and agrees to finance a bucket shop for him.

Henry has to solve a series of thefts from lorries and gets unexpected help from private security firm Troubleshooters. Their accuracy is such that he is suspicious of how they came to know of the crimes and believes that there is a possible informer within police ranks feeding them information for a reward. Troubleshooters are due to play the police eleven in an important football match. Both teams boast an ex-professional, in the police team's case Kirk Flowerbridge, who has a murky past and a liking for the drink. Fisher tasks Henry with minding Kirk and keeping him sober for the match. In the process of helping Kirk,Henry gets to identify the informer.