Sadie Speer owns an antique shop called the Antique Mine in Silver Peak, Colorado. She attends an auction and purchases an old black leather doctor's satchel full of medical instruments and begins to research for the provenance. Sadie's granddaughter Sara left on a horseback ride; the horse returned without Sara and most of the town turns out to search for her. The book goes into the story of Sara's disappearance, a mysterious woman, and who the old medical bag belonged to.
I've read one other book in this series, liked it enough to want to read others, and enjoyed this one too. All of these books seem to be nice, clean, Christian fiction where the stories are easy to read and follow.