After 16-year-old Ruth Ann (Roo) McCabe flips her car in a terrible accident, she is left paralyzed and silent. Suffering from locked-in syndrome she is trapped in her own body screaming to be heard. Mathilda (Tilly) is Roo's 14-year-old sister and best friend. She was the one who texted Roo and inadvertently caused the accident. Now, Tilly must grapple with her overwhelming guilt and her growing feelings for Roo's boyfriend, Newton, the only other person who seems to get what Tilly is going through. Tilly might be the only person who can solve the mystery of her sister's condition, who can see through Roo's silence to the truth underneath.