When Lord Ashfordly's gamekeeper turns to crime to pay off his debts, the consequences are dire when his wife commits suicide, which is witnessed by Mike, leaving the constable overwhelmed with guilt and threatening his relationship with those closest to him when he endures on a downward spiral. Meanwhile, Greengrass cannot believe his luck when he and David come across a stranded lorry loaded with bags of coal, whilst Gina takes pity on Andy when he ends up in hospital, but Blaketon recruits Andy's wife to thwart Andy's chances of worming his way back into Gina's life.

A visit from Jackie's parents causes friction between her and Mike when her mother attempts to drive a wedge between them as she thinks a village bobby isn't good enough for her daughter, leaving Jackie with a difficult dilemma. Meanwhile, Greengrass, David and Gina befriend a musician called Micky Shannon and organise a concert at the Aidensfield Arms. Andy has bad history with Micky, and consumed with jealousy by his relationship with Gina, plots to prove that he is not all he seems, whilst Craddock and his men tackle a case of diamond smuggling when they find an abandoned car in the river.