Abbie Fox hasnt seen her father or two younger sisters in almost two years. But now Lily, the baby of the family, is sending Abbie urgent emails begging her to return home. Their middle sister, Emma, has taken to her bed, devastated after losing her high-powered job and breaking up with her fianc. Also, Lily is worried that the beautiful, enigmatic woman renting their guesthouse has set her sights on their widowed father. The Fox sisters closed ranks years ago after the haunting, untimely death of their mother, but seeing their dad move on with his life forces each of them to take stock.

Over the course of the summer, the sisters lives grow as turbulent as the unpredictable currents off the New England coast: Abbie breaks her own rules in the name of love, type-A Emma learns a new definition of success, and strong-minded Lily must reconcile her dreams with reality. At summers end, these unforgettable women will face profound choicesand undergo personal transformations that will surprise even themselves.