Del's weekend fishing trip to Boycie's country cottage strangely coincides with a local restaurant owner's need for cheap fish. On the journey they are stopped by the police who inform them of an escaped killer who is believed to be in the vicinity. They arrive at the empty cottage with a sense of foreboding...

The Trotters take a trip down to Cornwall to make use of Boycie's country cottage for a spot of salmon poaching.

The fishing trip should be a nice little earner with £10 a salmon being paid for by Mario's fish restaurant. Del thinks that Rodney, Grandad and he will catch the fish and split the profits 50-50 with Boycie for providing the accommodation - they just didn't bank on an escapee from the mental institute.

On the rainy journey down to the cottage, a policeman stops their Robin Reliant and warns the tourists that a patient has escaped from a nearby institute for the criminally insane - precisely a decade after he killed a party of weekend fishermen with an axe.

Never one to let a psychotic killer get in the way of a nifty bargain, Del ignores the objections of Rodders and Grandad, and they settle down for their first night in the cottage.

As the storm worsens, Rodney thinks he hears noises outside, and when a face appears at the window, he's convinced it's the killer. There's a knock at the door, and the Trotters find the institute's Chief of Security is there to reassure them - it's only later that it becomes clear that he is, in fact, the fugitive axe murderer.