The snow is deep in Maines Busman s Harbor and the mighty rivers are covered in ice. Snowden Family Clambake Company proprietor Julia Snowden and her mother, Jacqueline, are hunkered down for the winter when a mysterious package arrives heating up February with an unexpected case of murder ... Inside the mystery package is an enormous black diamond necklace that once belonged to Julia s great-grandmother and disappeared in the 1920s. Who could have sent it and why? Julias search for clues takes her on a perilous journey through her mothers troubled family history, from a squabble over the family fortune in frozen water to the recent unexplained death of Jacquelines long-lost cousin Hugh who d been missing and presumed drowned for more than forty years. To protect her mother s inheritance, Julia must fend off a small army of feuding relatives, solve the mystery surrounding Hughs demise, and get back home before the next blizzard buries them all.