Thirteen-year-old Violet Windsor is obsessed with the rush and thrill of skateboarding through a dangerous, gang-ridden part of New York City. Certain that her high-society parents wouldn't approve of the rough-and-tumble sport or the sketchy neighborhood, she and her best friend, Sloane, hide her secret adventures in a thick veil of lies. When Violet's autistic, non-verbal brother, Oliver, begins drawing pictures that reveal a mysterious knowledge of her secrets, Violet is rattled to the core. Intrigued by clues in Oliver's drawings, she follows them down a reckless path toward redemption and truth.