Since they were children, they've shared almost everything—reading the same books, running down the same sandy footpaths to the beach, eating peaches from the same market, laughing around the same sun-soaked dining table. Even sleeping in the same bed, on the very same worn cotton sheets. But they've never met.Sasha's dad was once married to Ray's mom, and together they had three daughters: Emma, the perfectionist; Mattie, the beauty; and Quinn, the favorite. But the marriage crumbled and the bitterness lingered. Now there are two new families—and neither one will give up the beach house that holds the memories, happy and sad, of summers past.