London policeman Nick Rowan and his recently qualified Doctor wife - Kate move away from the city and go to the rural surroundings of Aidensfield, a village in the heart of the North Yorkshire Moors, where Nick's the new village policeman. Whilst they are still settling in, Nick's new section Sergeant, a Sgt Blaketon calls for Nick and takes him to see the local Rogue - Claude Greengrass and insists that he charge him with livestock worrying after his dog, Alfred killed a budgie! Greengrass admits Alfred did kill the bird and offers compensation, but Blaketon insists Greengrass be charged, despite Nick's reservations. The case goes to Court, but due to insufficient evidence, the court can't charge Greengrass as a budgie isn't classed as livestock. Meanwhile a local woman, Georgina Fraser tells Nick that she has a prowler at her house and one night she calls Nick out when the prowler returns. She then see's him at the village pub, the Aidensfield Arms, and Nick goes to see the Landlord

Nick is puzzled by a succession of drunken hikers on the moors. A man called Potter is then cautioned for passing on his home made wine which is responsible. Potter also gets accused of indecent exposure, but Nick later discovers this is incorrect! Meanwhile a employee of the local bank reports her husband to be missing. Nick goes searching for the man, but there is no sign of him. Later, he finds out that the man has hung himself because his wife was having an affair with the manager of the bank. Alan Maskell is then refused a loan from the bank to start his own business, but Nick is able to use the mans death to persuades the bank manager to change his mind. Kate has further trouble with Dr Ferrenby after advising Mrs. Maskell, a mother of six to take the contraceptive pill. This also angers Mr. Maskell, who feels it is a threat to his virility.

Nick investigates two mysterious barn fires that have happened recently. A young woman is also assaulted in a barn by her new boyfriend. The woman is persuaded by her friend, Sandra Murry (Alan Maskell's girlfriend) to report him to the police. It turns out that the woman's boyfriend is also the arsonist responsible for the barn fires. Meanwhile a local woman's horse keeps escaping from it's field and Nick is concerned that it will cause an accident. Kate has another argument with Ferrenby when she puts the unmarried Sandra Murry in touch with the family planning Clinic over birth control. And Greengrass gives Nick a tip-off about a poaching gang and when to catch them. The police organize an operation to catch the poachers, they catch a couple, only later to hear from Lord Ashfordly that a bigger gang cleared the river of fish further along.

There are a number of burglaries in the area recently which all have a connection, the thief tidies the house before leaving with the loot, which is usually silver. Nick checks around the local auction houses to see if anything has been passed on. He also begins to suspect local do-gooder, Penelope Stirling of being involved in the burglaries when he sees her buying incomplete sets of antiques. Meanwhile the police warn the local residents, including Lord Ashfordly to be on the look out for the thief and advise them to hide valuables which can be seen from the windows. The police catch the thief however when he burgles Ashfordly Hall where he straightens a picture which is wired to an alarm at the police station. Stirling turns out to be stealing antiques which are part of sets. She then buys the rest of the collection when the old people who the sets belong to die for a fraction of there true value. Then she sells the complete collections for the full price. Nick however can't prove i