Since moving from L.A. to California's verdant wine country, widowed single mom Cece Barton has gone from Colinas wine bar manager to wine bar owner-with a chaser of sleuthing . . . It's Memorial Day weekend and Sonoma County's Alexander Valley is buzzing with activity. For Cece, business at Vino y Vida is going great, as is her romance with new beau, Benjamin. Meanwhile, Cece's neighbor, Richard Flora, is stirring up controversy with his newest article, an exposé of Regan Greene, power-hungry chair of a valley district organization. Also in the mix is the town's upcoming big classic car show, paired with wine tastings . . . Cece is concerned the tastings will cut into her holiday weekend profits-until she and her mechanic, Josie Jarvin, are asked to co-sponsor a booth. . . . At the show, Cece spots Regan Greene, who is displaying her restored green '72 Thunderbird convertible. As Cece pours tastes, she witnesses several heated discussions with Regan-including an argument with wine afficionado and new Colinas hardware store owner Greg Jardis. Otherwise, all goes smoothly-until Sunday brings shocking news. Regan has been murdered . . . Rumors fly that Richard may have orchestrated the homicide-or even committed it. But Cece knows that's absurd. And others in Cece's orbit seem to have discomfiting connections to Regan, from Cece's employee, Dane, to her winemaking teacher's sister, Yolanda, to Colinas Mayor Guittierez. And after Yolanda visits the wine bar, Benjamin says he recognizes her from a road race. Determined to clear Richard's name, and failing to extract any clues from detectives, Cece once again enlists her twin, Allie, as her partner-in-sleuthing. But they'll have to act quickly, before the trail goes sour . . .