Henry and Margaret spend a day at the races with her new client Bob Bishop, who is resisting a take-over bid for his cider brewery. A mysterious man shadows Henry and then the corpse of stable lad Ben Tucker is found in a horse-box. Bob's brother Tony owns the stables, which are failing, and he is very curt with Henry when he comes to investigate. On the night he died Ben had argued with another stable lad Jerry Lawless over female jockey Jude O'Brien but he too is murdered and Bob's daughter Liz, another jockey, is found in his caravan with a bag full of bank-notes.

Liz claims the money is winnings from a bet and Henry releases her but notes that Jerry too has a healthy bank balance and surmises he was trading inside information for cash. Tony apologizes to Henry but tries to push Bob into accepting the take-over and Henry's mystery man proves to be a private eye, since Tony has been fixing races and the Jockey Club have hired him to get proof. Henry believes Tony got Jerry to nobble his horses and killed Ben when he found out. He has the correct motive but the wrong suspect and it's Margaret who literally stumbles on the real killer and has a close call with them. Meanwhile Nicola is annoyed when a spoilt school-friend appears to be making a play for Gary, though she is actually trying to poach him for her restaurant - unsuccessfully.

The Chen family appear to be victims of racial harassment when their Chinese takeaway is set fire to but widowed Mr. Chen will not go to the police so his daughter Mei asks Henry for help, It turns out that Chen is a gambler deeply in debt to a restauranteur in London's Chinatown who has been has been threatening him for the money he owes. When Pie in the Sky makes it to the final of the Great British Grub contest being held in London, Henry uses the trip to visit Chinatown and act as go-between. A winner and a loser return to Middleton come the end of the day.

The 'Happy Ploughman' food chain has won the franchise for the Police canteen, but is being subjected to deliberate vandalism. An obvious suspect is Flora McKee, a local baker who was not only rejected as a supplier to the firm, but was upset by improper advances made to her by its manager, Geoff Reece. Spurred on by Fisher, Henry tracks down the culprit and solves an old mystery into the bargain.

An armed hold-up at 'Pie in the Sky' while jewel-rich Mrs. Burdett is present brings DS Stringer to investigate. His abrasive manner alienates all the restaurant staff, including the normally placid Henry. He accuses first Gary, then Nicola and her new boy friend Paul of passing on the information regarding the Burdetts' booking to the thieves. But Henry's judicious questioning of the victim brings the solution, in time for Gary to celebrate two years of sobriety.