Twelve-year-old Sunny’s world feels out of orbit in a home filled with silence and her mother’s strict rules—until her quirky, star-loving grandmother, Neppy, steps in to change her universe.

Over a summer of cosmic wisdom and heartfelt journal entries, Sunny navigates the awkwardness of a changing body, big emotions, and a crush on Zolt, the dreamy boy from the music store. As Neppy guides her through the rhythms of growing up, Sunny begins to understand what it means to be made of stardust.

When family tensions surface and heartbreak strikes, Sunny must find the courage to choose herself, trust her changing body, and discover that the answers she’s been searching for have been within her all along.