Dugal Joughin's Lost Treasure - The Island Connection, #14

In 1765, The Crown bought the feudal rights to the Isle of Man for the princely sum of £70, 000 (almost twelve million pounds today). Not that The Crown wanted a little island 36 miles long and 12 miles wide but, because it was the centre of smuggling for the whole of Western Europe, it was costing the British Exchequer millions a year in lost revenue. So, the day after the deal was done, they sent in their customs men to clean the place up. One of the most effective smugglers was Captain Dugal Joughin who, as the customs men closed in on him, sank his treasures in the depths of Kilpheric Lake.
Unfortunately he had no means of ever retrieving them. Today, Noah Callow does. And so he goes looking. But he's not alone because ruthless businessman Albert Lynch is out for blood, and sees this as a way to settle a longstanding debt. Meanwhile, when the body of Dodgy Dave Finlay is found floating on the lake, the police become involved and Chief Inspector Mick Duckworth sees his chance to resolve old scores. Throw into the mix a dead car driver and a couple of sexy business women, and you have all the ingredients for another humdinger of a plot.