The programme was a light-hearted mystery series created by Ian Mackintosh about a husband-and-wife pair of amateur detectives, Rupert and Amy Wilde (played by John Stride and Julia Foster).

They live in a luxurious apartment in an old Manor House in York, but despite this and an enjoyment of the finer things in life, they are sometimes short of money and are often dogged by Income tax demands.

The only other semi regular in the series is a fellow tenant of the Manor House called Bailey (played by Patrick Newell), a dapper dandy of a man who runs a secret business in pornography of all aspects (some less than savory), as well as using his own flat to shoot pornographic films, all under the noses of the local police.

Amy is invited to a private party held by the elderly Mrs Tegaskis, who asks the guests if they would support a campaign for a natural lake to be built in the area.

But over the weekend Helen's boorish husband David becomes increasingly erratic and dangerous - only for him then to suddenly disappear... Rupert's agent Christopher contacts the couple to investigate the new property he has bought in the country, convinced it is haunted.

In Manchester to meet a film producer who wants to adapt one of Rupert's novels, the couple are fascinated by a sinister looking gentleman in a diner who requests the vionlinist play "Danny Boy".

But someone has been regularly collecting her mail... Travelling on the train from Italy, the Wildes discover a woman in their cabin, only to be told that they have the wrong compartment.

All he has for her location is a postcard with a picture of York Minster on it... Rupert gives a lecture at a prison, but upon returning home discovers a manuscript that has been planted in his bag.

Unable to contain their unease, the couple decide to dig deeper... Amy receives a letter from her friend Debbie Stewart, who is convinced she is going out of her mind.