While on a transatlantic hunt for some authentic wares to sell at her shop, Peggy is looking to forget her troubles by digging through the hidden treasures of the Scottish Highlands. With so many enchanting items on sale, Peggy can't resist buying a beautiful old tartan shawl. But once she wraps it around her shoulders, she discovers that her purchase comes with a hidden fee: the specter of a fourteenth-century Scotsman.
Unsure if her Highland fling was real or a product of an overactive imagination, Peggy returns home to Vermont—only to find the dead body of her ex-boyfriend on the floor of her shop. When the police chief arrests Peggy's cousin based on some incriminating evidence, Peggy decides to ask her haunting Scottish companion to help figure out who really committed the crime—before anyone else gets kilt.