Madeline King and Grace Pancik are best friends and the envy of Nantucket for their perfect marriages, their beautiful kids, their Sunday night double dates with their devoted husbands. But this summer, something's changed, and if there's anything Nantucket likes better than cocktails on the beach at sunset, it's a good rumor.

And rumor has it...

...that Madeline, a novelist, is battling writer's block, with a deadline looming, bills piling up, and blank pages driving her to desperation--and a desperately bad decision;

...that Grace, hard at work to transform her backyard into a garden paradise, has been collaborating a bit more closely that necessary with her ruggedly handsome landscape architect;

...that Grace's husband, successful island real estate developer "Fast Eddie" Pancik, has embarked on quite an unusual side project;

...that the storybook romance between Madeline's son, Brick, and Grace's daughter Allegra is on the rocks, heading for disaster.

As the gossip escalates, and they face the possible loss of the happy lives they've worked so hard to create, Grace and Madeline try mightily to set the record straight--but the truth might be even worse than rumor has it.