It’s been fifteen years since Kimmy Devine promised herself she’d never move back to the idyllic South Jersey beach town of Rocky Cape. She doesn’t want to relive the crushing heartbreak and scandal that ravaged her world as a teen. Her younger sister, Erin, shares those feelings, the wounds she caused so many years ago forever binding her and Kimmy. Yet here they are, back in their hometown, running from disappointment and heartbreak. The more time they spend in Rocky Cape, the stronger the pull of nostalgia, and both Erin and Kimmy step into the past like a pair of last year’s sandals, forgetting about the blisters they caused. As the sisters celebrate their homecoming at their parents’ yacht club, a handful of familiar faces arrive to dampen the revelry. The next morning, a body is found floating nearby, and long-submerged secrets from their adolescence begin to appear. Someone from the sisters’ past, it seems, is out for revenge.