In the small seaside town of Palmetto Beach, the Sheffield sisters--responsible Riley, vivacious Maisy-Rose, and fun-loving Adelee--reunite to save the family's beach-community bookstore. But summer also marks the return of Mack Logan, whose choice of Maisy over Riley years ago destroyed the special closeness between the sisters...

Now Riley, a single mom, is hiding a shattering secret about their mother. Maisy, a California designer, still blames Riley for ruining her one true love. And Adalee resents the family's intrusion into her summer plans. All three will be forced to confront the conflicts that tore them apart and the bounds of love and loyalty that still draw them together...