The Bridgertons spend every summer near the coast, where Anthony Bridgerton reigns like the king of youth itself—loud laughter, horse races along the cliffs, endless parties, and girls constantly chasing after him. Then one afternoon, he sees her. A mysterious girl in a blue bathing costume walking along the shoreline with saltwater on her skin and sunlight in her hair. And suddenly, Anthony Bridgerton—who has never once struggled to speak to a girl in his life—cannot remember how to breathe. What begins as a summer infatuation slowly becomes something far more dangerous: first love. But summers always end. And Anthony has never been good at letting things go.