Car crime is on the rise, with most of the vehicles being stolen from the car park at the railway station. Henry's problems mount as he not only has to deal with two separate sets of thieves, but also with a hostile new female Superintendent. Things come to a head when Fisher's car is nicked at the station right under his nose. Back at the restaurant Gary and Margaret are being given a hard time by an over-zealous Food Inspector. Will she do as she is threatening and close the restaurant down?

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.