Vince Wain is visiting his ex-wife Brenda and their son Martin. While he is at their house he helps himself to their savings and is very surprised when Brenda goes to the police about it. During the following row Martin decides to run away and asks David to help him. They even become blood brothers and promise each other not to let each other down. Mr. Turner is cleaning windows at Ashfordly Hall when he is bitten by his lordship's dog Jack and demands that the dog is put to sleep. Lord Ashfordly even risks being charged in that he cannot prove that the dog is not a danger to the public - no easy task because Jack has quite a history in the biting department. Luckily for him help is not far away and Aunt Peggy offers to train him - the dog that is, not Lord Ashfordly.

PC Walker and PC Bellamy give Malcolm Stainsby a lift to his home because of his bad legs. Stainsby has been away since the war, but his wife - or rather ex-wife - Diane says that her husband Malcolm is dead. She even has his death certificate to prove it. Stainsby claims that he has only recently regained his memory after a cinema he was in was hit by a flying bomb. David and Aunt Peggy surprises a mushroom collector on their land and Aunt Peggy discovers that some people will pay good money for mushrooms. And while all mushrooms are eatable their effect may differ quite a bit. Sergeant Miller books PC Younger on a driving course. But Younger only has a provisional driver's license and needs a lot of driving experience. He gets Rosie to give him driving lessons and soon the whole village puts more into their relationship than there actually is.

Sin el policía del pueblo en Aidensfield, Tommy Unsworth y sus amigos motociclistas aprovechan la oportunidad para causar muchos problemas en el pueblo. Incluso la tía Peggy está molesta porque los motociclistas están invadiendo las tierras del Lord Ashfordly, perturbando el orden natural al asustar a los animales de caza y dejar sus trampas vacías. Pero como tomará un tiempo conseguir un reemplazo permanente, Miller organiza una solución temporal. Así que el oficial de policía Joe Mason se muda a Aidensfield de forma temporal mientras espera su traslado a la Metropolitana. Mason es muy ingenioso y un poco rebelde, y sus superiores estaban más que felices de deshacerse de él. Los aldeanos tampoco están muy contentos con él. Pero Unsworth no es la única fuente de problemas. Una banda profesional de Manchester está apuntando a las casas de campo de la zona para robar pinturas, antigüedades y joyas.

El oficial de policía Mason descubre que ser un agente de un pueblo no siempre tiene que ver con el trabajo policial cuando lleva a la enfermera Cassidy en su auto hasta una granja y el granjero le pide ayuda para sacar una vaca del barro. Pero también tiene algunos casos reales cuando alguien roba 12 chelines de la colecta en la iglesia del pueblo y desaparece una fotografía de Ashfordly Hall. La joven Charlie Prentice pide indicaciones para llegar a la finca de Ashfordly y le dice a Oscar Blaketon que está buscando a su padre y está convencida de que es Lord Ashfordly. David Stockwell decide hacer un testamento porque teme dejar un desorden cuando muera. Tal vez eso no fue una buena idea después de todo.