Home. . . . That's what Martha's Vineyard is to Annie Sutton now.

After a winter spent writing her latest novel, Annie looks forward to a summer with friends who have become like the family she never had. But then her landlord announces that his grandson will be moving into her cozy Chappaquiddick cottage—and she'll be moving out. Year-round island housing is tough to find at any time; in summer, it's nearly impossible. Shaken by the thought of being forced to leave the people and the community she's grown to love, Annie seeks distraction in the July 4th celebrations—and stumbles upon a young woman who's unconscious on her front lawn . . . and barely alive . . .

Summer on the Vineyard brings not only tourists, but also wealthy families with summer homes—like Fiona Littleton's—and tensions between them and the tight-knit island community often ignite. But when Annie's quick thinking saves Fiona's life, she's surprised to learn that like her, Fiona has no one to lean on. And when Fiona fears that someone wants her dead, Annie cannot walk away. With depleting resources and no home on the horizon, Annie is certain of only one thing: each of them will have to rise to one of life's greatest challenges: feeling at home within themselves . . .