And not just any monster, it’s Scotland’s most famous monster. Much, much bigger than Bigfoot or a platoon of yetis, slumbering at the bottom of Loch Ness in a despondent mood, it’s Nessie. Nessie, revealed in the initial book in Cooper’s Boggart Series to be a boggart, a mischievous, shape shifting, house spirit formerly the resident of nearby Urquhart Castle. Nessie’s been sulking at the bottom of the Loch since the castle was blown up by departing loyalist troops in 1690, lest it fall into the hands of rebellious Jacobite forces.
When the vacationing Volniks, Jessup and Emily, arrive back in their ancestral home, Castle Keep, in the Inner Hebrides they are reunited with their Scots friend Tommy Cameron and Castle Keep’s new owner, Mr. Maconochie. Recently Maconochie has started to suspect that his new retirement home has another resident, a supernatural one fond of practical jokes. He’s worried about his sanity until Tommy, Emily and Jessup assure him that the boggart is very real, and that they’ve known him and his tricks for some time.
Relieved, Maconochie suggests a camping and sightseeing trip south to Loch Ness. Jessup is particularly delighted, because on the flight over from Canada to Scotland, he met Professor Harold Prindle, the leader of a new scientific expedition to Loch Ness. Equipped with the latest technology, including a pair of computer controlled robot submersibles equipped with sonar, he’s going to prove that the Loch Ness Monster is actually a plesiosaur or a family of plesiosaurs that survived the great extinction of 66 million years ago. Needless to say, the Maconochie party including the Castle Keep boggart, Doctor Prindle’s expedition, the media, and quite a few other tourists and merchants all descend on Nessie at once, and the fun and excitement begins.