Penny Lively loves running her family's winery, but to keep business growing, she needs to find a way to attract more guests. When she's approached to invest in a new train line through wine country, Penny and her intoxicating winery manager, Connor, hightail it to a lavish resort to hear the details. Unfortunately, her neighbor's daughter, Chantal, is also there, swirling up trouble by flirting with the married investors--and with Connor too.

When one of the investors' wives is murdered, Chantal, who was seen fighting with the woman, is the prime suspect. Chantal may be a sour grape, but she's no killer. So Penny, who's become a sleuthing connoisseur, starts sniffing out the real suspect--and discovers that her fellow potential investors have been savoring more than their share of deadly secrets...