"When a vintage typewriter comes into the shop, Mary is delighted to take a closer look at such a fun treasure. As she unspools the ribbon cartridge, Mary finds a clue to a fifty-year-old mystery! With the help of her sisters, Elizabeth and Martha, Mary looks into the cold case and makes some unexpected discoveries. With a long list of suspects, the Classen sisters soon realize that someone desperately wants these long-buried secrets to remain hidden....