In the summer of 1989, thirteen year old Laura journeys to Cape Cod for a family vacation that will change her life forever. There she meets Louisa and Maggie who have a mysterious set of letters written from somewhere on the Cape in 1947 by a woman known only as Esther. Laura pieces together clues from the letters that lead to a startling discovery buried for more than forty years and helps to effect the reunion of at least four generations of women...