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