Every summer, Vivian Levy and Lucy Webster spend a month each with their father, Hank, at his family cabin on a lake in Maine - Lucy in July, Vivian in August. Vivian is a successful sommelier working in NYC's fine dining scene, and Lucy teaches high school English in the nearby town. But these two sisters have never met. While Lucy always knew Vivian was out there, Vivian didn't know Lucy existed. For thirty years, they've lived completely separate lives, Vivian growing up in New York City with Hank and her romance novelist mother, and Lucy being raised by her single mom in small town Maine. When Hank tragically dies of a heart attack just before the Fourth of July, Vivian brings his ashes up to the cabin to scatter them in Fox Hill Lake, only to find Lucy at the house, expecting her father for their annual visit. What begins in shock, suspicion, and hostility gradually thaws into a deep and unexpected connection between the sisters as they discover the true stories of their parents' past, help each other grieve for the father they thought they knew, find a bit of summer romance, and determine the new course of each of their lives.