Amy Stone has recently returned to Copper Springs, a small town on Historic Route 66 in Arizona, in order to run her family's rock shop, Stone's Gems and Minerals. In a horrific welcome home, however, she was faced with the murder of the shop's employee, and forced to defend herself against the actual murder, with the help of the shop's new assistant, Jackson Wolf.Now that things have settled into a more peaceful way of life, Amy and Jackson are looking forward to things returning to normal.Unfortunately, a fun field trip to a local mine, organized by the local rock club and the Copper Springs Historical Society, throws their new found peace into turmoil as one member of the field trip is assaulted and the body of a miner who disappeared over thirty years ago is discovered.Amy and Jackson are determined to clear their friend Pete Martin's name. That proves to be a difficult task, as Pete has been witnessed arguing violently with the assault victim not long before he was pushed into a mine shaft and left to die. Along the way, the duo find themselves faced with the older mystery... why was the miner killed, and who will he kill next?This is Book Two in the Rock Shop Cozy Mystery series.