Fifteen-year-old list-maker Lena Hart avoids public mistakes-until a chalk note on Harborview's cliff steps dares her to try. A class "Micro-Brave" project, a viral sound mix, and a town booth of first tries push her from quiet planner to imperfect doer. With skateboarder Rowan and tech-whiz Priya, Lena learns "practice falls," maps her seaside town's sounds, and faces family stress after her dad's job loss. When plans crack, she rebuilds-one step, then the next-in a heartfelt story about small courage that changes everything.