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.

A financial advisor called Nigel Wheeler arrives in Aidensfield and tries to sell the villagers insurance. Nick is sceptical, and when Jo's father becomes involved in Wheeler's business, Nick decides to do some digging into Wheeler's past. Meanwhile, Greengrass, Ventress, George, Gina and Blaketon all receive poison pen letters threatening to reveal hidden secrets from their pasts, but who sent the letters and why is a strange man stalking councillor and recently widowed Joyce Jowett?