Steve investigates a fire at a textile warehouse and it soon emerges that the owner's wife has spent time behind bars for fraud, and her husband isn't too forthcoming when questioned, leading Merton to suspect the blaze was the outcome of a bitter feud between husband and wife. Meanwhile, Vernon moves into his new mansion, but has trouble keeping up with his well-to-do neighbours. Meanwhile, Vernon moves into his new mansion, but David isn't too keen on joining him. Trying to impress his neighbours, Vernon ends up going into business with a silver-tongued housewife involving horse-drawn hearses. However, he finds himself forced to choose between his new friend and surrogate son David. Elsewhere, tension boils over between Jenny and Merton following recent events.

It's Merton and Jenny's big day, although the event doesn't go according to plan when a former CID colleague of Merton's asks the team to track down an ageing bank robber known as "Ronnie the dog man". Things begin to go wrong when Jenny's disgraced brother Steve returns, claiming to be a changed man and desperate to make amends. Meanwhile, Vernon promises Jenny that he will catch a fresh wild salmon for the wedding, only for Bernie to be more successful than him, whilst Bellamy turns to Blaketon when Gina becomes paranoid that he only wants to marry her because she is pregnant.