Gwen Castle has never so badly wanted to leave her island home till now: the summer her Biggest Mistake Ever, Cassidy Somers, takes a job there as the local yard boy. He's a rich kid from across the bridge, and she hails from a family of house cleaners who keep the islands summer people happy. Gwen worries this will be her fate too, but just when it looks like shell never escape what happened - or the island - her past explodes into her present, redefining the boundaries of her life. Sparks fly and secrets histories unspool as Gwen spends a gorgeous, restless summer struggling to resolve what she thought was true - about the place she lives, the people she loves, and even herself - with what really is.

One heartbeat can change everything. I'm still me. I'm still the same person who comes to life in the water. A tiny white pill can't change all that.