Liz and Ben's wedding day arrives, but Vernon's efforts to make the party go off with a bang ends in chaos when Ben finds himself assisting Rob and the team when a banker's wife is kidnapped. Merton faces the toughest decision of his life as the extent of Jenny's mental issues becomes clear, forcing him to choose which is most important to him: his wife or career. Helen Trent's dreams of a fresh start for her marriage look set to be shattered, and Bellamy is delighted when he is promoted to acting sergeant in Merton's absence.

Rob is forced to confront his criminal past when he undertakes his own unofficial investigation into a series of violent burglaries against the elderly residents of Aidensfield, but his snooping into the lives of his father's dangerous associates looks set to have a profound impact on the officer's family when he finds evidence that could nail a major underworld figure for an unsolved armed robbery, which would also put his own father behind bars. Meanwhile, David falls for Matthew Trent's former mistress and finds himself acting as a secret messenger in their sordid affair, leaving Gina, Bernie and Rosie suspicious of his behaviour. Elsewhere, a fresh new constable shows up at Ashfordly station for his first day - PC Geoff Younger, much to the man-eating sergeant Nokes' delight.