The preparations for Liz Merrick's and Ben Norton's wedding are in full swing and her replacement as the local GP, Dr. Helen Trent, arrives and immediately has clash with Jenny. Speaking of Jenny Sergeant Merton is very worried about her and talks to Dr. Merrick about her, but the beautiful doctor assures him that there is nothing wrong with Jenny. For once Dr. Merrick is wrong and Jenny leaves the surgery unattended and unlocked. When Dr. Merrick returns she finds the surgery in a mess and some dangerous pills missing. When Jenny is confronted with she gets angry again. Her husband tries to help her, but only manages to convince her sick mind that everybody is against her. And he almost gets arrested for assaulting her when she runs away.

The day of the wedding between Dr. Liz Merrick and Ben Norton is growing near, but the happy event is overshadowed by Jenny's mental illness and Sergeant Merton seriously considers getting a transfer to be near her and able to support her. PC Walker finds an abandoned car on the moor. It is registered to Angela Price, who has been kidnapped and the kidnappers have told her husband not to involve the police. But Sergeant Merton knows Price and finds out anyway and he suspects that the kidnappers hide out in a farm they have rented from Lord Ashfordly. Ben Norton nearly misses his wedding when he is asked to assist the police because he knows the premises.

Rosie does the shopping for Miss Edgar. One morning she finds the old woman tied to a chair when she comes to deliver the groceries. Miss Edgar says the assailant posed as a representative from the Council and drove a grey van. It may have been the same van that forced Louise Parry off the road and nearly did the same to David in the brown lorry. David sees to the needs of Miss Parry getting her to the Aidensfield Arms and has Bernie pick up her car. She also asks him to deliver a letter to Dr. Trent's husband Matthew personally. He soon becomes their secret messenger. Meanwhile more victims of the man in the grey van are discovered. PC Walker believes he has information vital to the case, but when Sergeant Nokes refuses to listen to him he does a little investigating of his own among his father's old friends. There is a new constable at the Ashfordly police station. His name is Geoff Younger and this is his very first posting.

Malcolm Fairchild has just had his car checked and MOT-tested at Bernie's garage when he loses control over the vehicle and plunges into a garden. Luckily nobody gets seriously hurt, but Bernie gets into serious trouble because the tyres are bald. The next morning he is nowhere to be found and David fears the worst.. Helen Trent's estranged husband finds out about her affair with Rob Walker and makes a complaint to Sergeant Miller, who takes the matter very seriously.