When her son says he and his fiancée want to marry “in the shadow of the Matterhorn,” Dotsy Lamb doesn’t realize it means she’ll be staying in the same remote Swiss chalet as her ex-husband and his new wife. But rather than spoil the young ones’ plans, Dotsy puts on a brave face and heads to Switzerland, determined to make the best of it. Then when the bodies of Stephanie Lamb, the second wife, and the cook Gisele are found in a nearby World War II bunker, Dotsy becomes suspect number one. In addition to the familial conflicts inside the house, a glider from a nearby airstrip keeps flying over the house while a shadowy Russian and a man in red shoes keep popping up. Dotsy’s friend Marco, a high-ranking Carabinieri official from Italy, arrives and lends his expertise.
The murdered Stephanie has left enigmatic phone pad notes with a Chicago phone number and references to South African gold.