The state of Maine’s license-plate motto is “Vacationland,” and for many New Englanders, its southern coast defines the concept of summer: cottages near small beach towns, long days of family gatherings for barbecues and water play, picnics and the freshest berries and seafood. Three generations of the Kelleher family have spent their summers this way, at their property in Cape Neddick, for sixty years. However, the family dynamics have shifted since patriarch Daniel died a decade ago, and his widow Alice is making plans for the home he left her. So are her son Patrick and his wife Ann Marie. Meanwhile, her daughter Kathleen has made a new life on the West Coast and hasn’t come back to Maine since her father died, although Kathleen’s daughter Maggie finds a sense of home there.