
Brynn Costa arrives in swampy Florida furious, phone-less, and convinced she’s been exiled. Her father, Hunter, lives on a dingy houseboat anchored in a mangrove bayou—isolated, internet-free, and loaded with new dangers for a girl whose brain is constantly forecasting catastrophe.
When Brynn meets Skylar, a sharp-tongued, magnetic swimmer who appears out of nowhere, a tentative friendship sparks in the water’s shadow. But the connection turns impossible when Brynn learns Skylar died years ago—found by Brynn’s own dad. As storms build, both inside Brynn’s mind and in the Florida sky, she chases answers through libraries, grief-stricken parents, and her own spirals, seeking a way to help Skylar and herself.