As Constable Nick awaits news of his future, he reminisces about times gone by in Aidensfield and recalls the variety of fairs he has attended. The arrival of a noisy fun fair sparked off a hunt for a missing schoolgirl thought to have run off with a fairground worker: but her father had also vanished, and the discovery of a treasure trove and a long-dead body on the moors revived ancient memories of a mystery person going to Scarborough Fair. Dealing with these dilemmas, and more was all part of Constable Nick's duty as the village constable.