There is a new bobby in Aidensfield. Steve Crane will replace PC Bradley, who has been transferred to CID. Crane is not the only newcomer in the village. Dr. Liz Merrick moves in at the surgery as the new GP in Aidensfield. She is concerned about the loss of patients since her predecessor died, but Vernon Scripps offers to deliver a letter from her to every potential patient in the village. Two neighbouring farms have been broken into, but the owners Jack Farrow and Walter Rawlins say the break-ins are mere trifles and not worth any police attention. PC Crane does not agree and suspects they cover something up. Gerald Dunphy is wanted for armed robbery and Mike's first case as a detective constable is to keep an eye on his girlfriend in case he shows up.

Joyce Carswell does not get along very well with her mother-in-law. The old lady dies under mysterious circumstances and it seems that Joyce has killed her. But her husband makes it look like the old woman's death was caused by a man, who has robbed several old people in Aidensfield by posing to be from the water board. Oscar Blaketon is making inquiries in a very serious matter. The Aidensfield Darts Trophy resides in the White Lion pub, but it rightfully belongs to the Aidensfield Arms. To settle the matter he and Angus Fergussson, the owner of the White Lion, agree on a final winner-takes-it-all match. David wants to play for the Arms, but when Blaketon will not let him try out for the team he joins the White Lion team instead.