Glass Ferry, Kentucky, is bourbon country. Whiskey has been a way of life for generations, enabling families to provide and survive even in the darkest times. Flannery Butler's daddy, Beauregard "Honey Bee" Butler, was known for making some of the best whiskey in the state, aged in barrels he'd take by boat up and down the Kentucky River until the rocking waters turned the spirits smooth and golden. Flannery is the only person Honey Bee ever entrusted with his recipes before he passed on, swearing her to secrecy as he did so.

But Flannery is harboring other secrets too, about her twin sister Patsy, older by eight minutes and pretty in a way Flannery knows she'll never be. Then comes the prom night when Patsy-wearing a yellow chiffon dress and the family pearls-disappears along with her date. Every succeeding year on the twins' birthday, Flannery's mother bakes a strawberry cake, convinced that this is the day Patsy will finally come home. But it will be two tumultuous decades until the muddy river yields a clue about what happened that night, compelling Flannery to confront the truth about her sleepy town, her family's past, and the choices she and those closest to her have made in the name of love and retribution.