There's a particular kind of loneliness that comes from being invisible in your own family, overshadowed by someone who seems to shine effortlessly while you fade into the background. Moon Fuentez knows this ache intimately, living in the shadow of her beautiful, influencer-perfect twin sister Star, whose light seems to consume all the oxygen in every room they share. When the sisters embark on a summer tour selling merchandise for a social media star, Moon expects more of the same—more invisibility, more resentment, more of the suffocating dynamic that has defined their relationship. But the open road has a way of cracking things open, and Moon finds herself drawn to Santiago Phillips, a young photographer with his own complicated story and a way of seeing her that makes her feel luminous for the first time in her life. What unfolds is a journey of self-discovery wrapped in the heady rush of first love, as Moon begins to understand that her worth was never dependent on comparison, that her voice deserves to be heard, and that sometimes the universe conspires to show you exactly who you're meant to become. The miles between tour stops become the distance between who she was and who she's becoming. This is a story about finding your own light when you've spent a lifetime believing you had none to give, told with tenderness and the particular magic of a summer that changes everything.