Emma has always orbited Henri, her fierce, magnetic queen bee of an older sister. And the two have always been best friends—until a few months ago, when Emma betrayed Henri in spectacular fashion. When a boat ride off the coast of Puerto Rico ends in disaster, the sisters find themselves stranded on an uninhabited island with Alex, an enigmatic, green-eyed boy they’ve just met. As the heat between Emma and Alex burns hotter, the tension of the sisters’ poisoned bond grows more and more agonizing. The island is a gorgeous hell of danger, and as the days become weeks, the sisters must find their way back to each other if they’re ever to find their way home. .