When flamboyant senior sleuth Sadie Kramer learns the owner of Cioccolato, her favorite chocolate shop, is in trouble, she heads for the California wine country with a tote-bagged Yorkie and a slew of questions.The fourth generation Tremiato Winery promises answers, but not before a dead body shows up at the vintners' scheduled Harvest Festival.

All four Tremiato siblings have motives, as well as a few peripheral acquaintances, but only one could be the guilty party. As Sadie juggles truffles, tips and turnoil, she will have to sort the grapes from the wrath in order to find the identity of the killer.