When adoptee Lucille Jones comes to town researching her roots, Betsy Devonshire notices that she bears a remarkable resemblance to local Jan Henderson. Betsy introduces the look-alikes and they quickly hit it off. But then Jan's wealthy great-aunt is found dead, helped to her grave by a stiff metal wire—a double-zero knitting needle, in fact. Just like the kind Jan knits with.

Lucille begs Betsy to help clear her new friend's name. And while going through her aunt's effects, Jan finds an old pillow lined with an embroidered map of Lake Minnetonka. Betsy intends to follow the threads. Who knows—it could just possibly lead to buried treasure. Or, perhaps, to a secret that someone will kill to keep buried.