When Darby Farr's assistant, E.T., learns that his sister, Selena, has suddenly (and suspiciously) died in her hot tub, Darby and E.T. travel to Selena's magnificent vineyard estate nestled in the heart of California wine country. There, Darby discovers that Selena was entertaining offers from three different prospective buyers - each one of whom is desperate to be the new owner of the winery. As a saboteur wreaks havoc on the property, Darby risks her life to crack the case and close the sale in a valley ripe with jealousy, greed, and danger.