Teenaged Isobel "Belly" Conklin, whose life revolves around spending the summer at her mother's best friend's beach house, reflects on the tragic events of the past year that changed her life forever.

The discovery of a packet of old letters sends seventeen-year-old Abby Schoenberg to Nantucket to unravel a family mystery about her grandmother's past, but things get complicated when Abby meets the cute grandson of a prominent family who wants to stop her from investigating. Abby Schoenberg isn't looking forward to the summer before her senior year. She's just broken up with her first boyfriend and her friends are all off in different, exciting...

To escape her father's overprotectiveness, twenty-year-old Kenzie Caine spends the summer working at a horse farm rehabilitating Tennessee Walking horses, where a good deed results in a violent end to the summer and the revelation of her attractive assistant's secrets.

Sixteen-year-old Anna falls for Will, a New Yorker visiting her resort island for the summer, but she isn't sure if one summer of love will be worth her heart breaking when he leaves at the end of August.