Mike receives orders to provide a refuge for a dangerous police informant and struggles to keep it under wraps, especially when Nokes and Bellamy become suspicious about his strange behaviour. As Jackie suffers a terrifying ordeal at the hands of her new houseguest, Mike becomes mixed up in a case of police corruption. Meanwhile, David is devastated when Greengrass makes an abrupt departure from Aidensfield to join his sister in the West Indies when she comes into a large amount of money. Bernie is horrified when his entrepreneurial brother Vernon turns up in the village. Vernon is quick to worm his way into Greengrass' old cottage when David runs into trouble whilst calling in on an old debt of his former mentor, and Bernie is riled when his brother plans to cash in on his share of Scripps garage.

Jackie's rocky relationship with her mother worsens when she begins prosecuting one of her oldest friends for negligence in the workplace, setting in motion a horrifying chain of events that leave the Ashfordly officers with a murderer on the loose. Meanwhile, Vernon and David's latest enterprise of catering for pop concerts plunges the whole of Ashfordly into a blackout, whilst Ventress and Blaketon are wary of Gina and Bellamy's romance because romantic relations between a police officer and a licensee are illegal, putting Bellamy in a terrible predicament.