Aunt Bessie considers it an honour to be giving a presentation about her research at a conference at the Manx Museum. Miss Elizabeth Cubbon is known as 'Aunt Bessie' to nearly everyone in her hometown of Laxey. While she never earned a college degree, she’s become something of an expert in the history of the island that she’s called home for all of her adult life. Once she turned sixty, she stopped counting how many years that includes. Aunt Bessie considers it unfair when the entire conference schedule is thrown into disarray by Mack Dickson’s sudden arrival. Mack promises that what he has to say is important enough to warrant the upheaval. But even more turmoil follows when Bessie discovers Mack’s body only a short time after he’s finished giving his speech. Aunt Bessie considers Police Inspector Peter Corkill a poor substitute for her friend, John Rockwell. But the Manx Museum is out of Rockwell’s jurisdiction and that means Corkill is in charge of the investigation, no matter what Bessie thinks. With Corkill insisting that Mack’s death was probably an unfortunate accident, Mack’s slides that shocked the conference disappear. Bessie finds herself drawn into another investigation, and she’s determined to drag her friends, Rockwell, Doona and Hugh, in with her.