Libby has come home to Collinstown, Maryland to live her dream and open her own yarn shop, aptly named Y.A.R.N., along the Chester River. To Libby, Y.A.R.N. stands for You're Absolutely Ready Now. But the acronym changes whenever inspiration strikes, and customers add to the list of suggestions that fill the blackboard wall in a shop stuffed with color, fiber, and comfort.

Libby is thrilled when she lands famous Norwegian knitting celebrity Perle Langager for a series of events at Y.A.R.N. Libby's English bulldog, Hank, has been modeling one of Perle's doggie sweaters, and customers just can't wait to see Perle in action. The mayor of Collinstown even decrees a Collinstown Yarn Day to celebrate. But once Perle arrives in town, she seems distracted and on edge. And when she's found strangled with a skein of red yarn, Libby knows she has to solve a knotty mystery before her new life unravels.