While cleaning out her father's home, Nic uncovers a box of old secrets revealing that her happily-ever-after parents had actually separated after high school, and that her mother had a secret bohemian life on Nantucket one summer. Serendipitously, Nic is invited to Nantucket Island with new boyfriend, Cade Swain, for a big family wedding at Galley Beach.

Divorced mom of two college kids, Nic is both excited and anxious about staying with the Swains who are descendants of original settlers of Nantucket. The island's fabled history in juxtaposition with her mother's shocking truths turns Nic's life inside out.

As her worlds collide, Nic finds herself juggling sorrow over losing her dad, the realization that her parents were once teenagers themselves, and more tequila and rosé than she bargained for. Following an obscure trail of paintings and unexpected friendships, Nic risks the biggest love she's ever known to unravel the mystery of her mother's choices that long ago Nantucket summer.