Mirren Sutherland stumbled into a career as an antiquarian book hunter. Now, as Christmas approaches, she's been hired by Jamie McKinnon, the surprisingly young and handsome laird of a Highland clan whose ancestral holdings include a crumbling castle. It's said the McKinnon family's collection includes a book so valuable that it could save the entire estate--if they only knew where it was. Jamie needs Mirren to help him track down this ttreasure, which he believes is hidden in his own home. But on the train to the Highlands, Mirren runs into rival book hunter Theo Polliser, and instantly knows their meeting isn't chance. She's all too familiar with Theo's good looks, smooth talk, and uncanny ability to appear whenever there's treasure. As soon as Mirren and Theo arrive, snow blankets the Highlands, cutting off the outside world. Now they must unpuzzle the clues left by Jamie's grandfather, discovering the secrets of the house in a race against time.