A new arrival and the possibility of a merger heralds big changes for the Ashfordly station as Blaketon is replaced by Inspector Barry. However, the team must adapt to change as they attempt to track down a mysterious man in a Jaguar, who is attacking local youngsters, whilst Blaketon ponders retirement when he receives a tempting job offer at a security firm. Meanwhile, Greengrass ends up in hospital after agreeing to put a bet on for a friend and decides to set up home on the hospital ward as danger awaits him on the outside.

Nick comes to an unstable women's rescue when she drunkenly burns down her house after splitting up with her boyfriend. Nick's heroic act has big consequences for him and everyone he holds dear when she falls in love and becomes obsessed with him, and when he rejects her love, she vengefully sets out to ruin his life. Meanwhile, Greengrass enters the tourist business by turning his house into a B&B and providing his guests with a tour of Yorkshire, but his first guests are a bickering couple who draw him into their domestic issues, with dangerous consequences.